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A whole number that can be divided evenly by numbers other than 1 or itself.
e.g. Example: 9 can be divided evenly by 3 (as well as 1 and 9), so 9 is a composite number.

But 7 cannot be divided evenly (except by 1 and 7), so is NOT a composite number (it is a prime number).

All whole numbers above 1 are either composite or prime.

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The distance from the center to the circumference of a circle.

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a line which marks the limits of an area; a dividing line.
e.g. It defines the space or area.

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set over against something that is at the other end or side of an intervening line or space
e.g. the girl is on the opposite side of the room.

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The continuous line forming the boundary of a closed geometrical figure.

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Function notation is the way a function is written.

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A 4-sided flat shape with straight sides where opposite sides are parallel.

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the distance or measurement from side to side of something; width.
e.g. "the boat measured 27 feet in breadth"

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A turning point is a point at which the derivative changes sign.

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a property of space
e.g. extension in a given direction: A straight line has one dimension, a parallelogram has two dimensions.

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an algebraic equation of the fourth degree

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The range of a set of numbers is the highest number minus the lowest number.

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erectly
e.g. go downwards as a straight line

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Each entry in a matrix is called an Element

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a mathematical variable whose value is determined by that of one or more other variables in a function

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In mathematics, the logarithm is the inverse operation to exponentiation, just as division is the inverse of multiplication and vice versa.

e.g.

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A quadrilateral with at least one pair of parallel sides.

e.g

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In Euclidean geometry, an arc is a closed segment of a differentiable curve.

e.g.
A circular sector is shaded in green. Its curved boundary of length L is a circular arc.

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Angles larger than a straight angle but less than 1 turn (between 180° and 360°) are called reflex angles.

e.g.
270°

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In optics, a prism is a transparent optical element with flat, polished surfaces that refract light.

e.g.

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A 4-sided flat shape with straight sides where opposite sides are parallel.

Also:
• opposite sides are equal in length, and
• opposite angles are equal

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In geometry, two figures or objects are congruent if they have the same shape and size, or if one has the same shape and size as the mirror image of the other.

e.g.

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The base is a polygon (a straight-sided flat shape)

• The sides are triangles which meet at the top (the apex).

It is a polyhedron.

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A centimetre (international spelling as used by the International Bureau of Weights and Measures; symbol cm) or centimeter (American spelling) is a unit of length in the metric system.

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Breadth just means Width

Example: the breadth of this door is 80 cm.

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Angles larger than a right angle and smaller than a straight angle (between 90° and 180°) are called obtuse angles

e.g.
125°

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We can measure how long things are, or how tall, or how far apart they are. Those are are all examples of length measurements.

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A shape with only two dimensions (such as width and height) and no thickness.

Squares, Circles, Triangles, etc are two dimensional objects.

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The interesting thing here is that vertically opposite angles are equal

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They have a common side and a common vertex (corner point) and don't overlap.

Example:
Angle ABC is adjacent to angle CBD

Because:

they have a common side (line CB)

they have a common vertex (point B)

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The antonyms of Horizontal.

e.g.

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The hectare is an SI accepted metric system unit of area equal to 100 ares (10,000 m2)

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an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle

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the plane angle subtended by a circular arc as the length of the arc divided by the radius of the arc. One radian is the angle subtended at the center of a circle by an arc that is equal in length to the radius of the circle.

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The antonyms of Vertical.

e.g.

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How far a line goes along (for a given distance going up).

Rise/Run (Rise divided by Run) gives us the slope of the line.

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Definition: Two lines that meet at a polygon vertex.

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any unbroken part of the circumference of a circle or other curved line.

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How far a line goes up (for a given distance along).

Rise/Run (Rise divided by Run) gives us the slope of the line.

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A symbol that stands for an arbitrary input is called an independent variable.

e.g.All these have their own Independent variable.

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Again, let f(x) be a real-valued function of a real variable. Then f is odd if the following equation holds for all x and -x in the domain of f.

e.g.
ƒ(x) = x ³ is an example of an odd function.

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a mathematical expression composed of variables and constants that yields the successive terms of a sequence or series when integers are substituted for one of the variables often denoted by k

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Mathematics To move (a term) from one side of an algebraic equation to the other side, reversing its sign tomaintain equality.

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make the image easy

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In mathematics, a (real) interval is a set of real numbers with the property that any number that lies between two numbers in the set is also included in the set.

e.g.The addition x + a on the number line. All numbers greater than x and less than x + a fall within that open interval.

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The side opposite the right angle in a right-angled triangle.
It is also the longest side of the right-angled triangle.

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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License , Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.

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In geometry it is an exact half of a sphere.

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A mathematical convention is a fact, name, notation, or usage which is generally agreed upon by mathematicians.

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In geometry, the midpoint is the middle point of a line segment. It is equidistant from both endpoints, and it is the centroid both of the segment and of the endpoints.

e.g.The midpoint of the segment (x ₁, y ₁) to (x ₂, y ₂)

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The distance around the edge of a circle (or any curvy shape).

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他么的就是对角线你懂么
A polygon's diagonals are line segments from one corner to another (but not the edges).

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A plane is a flat surface with no thickness.

It extends forever.

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The vertical distance from top to bottom.

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Two Angles are Supplementary when they add up to 180 degrees.

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Gradient
the degree of steepness of a graph at any point.

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Two Angles are Complementary when they add up to 90 degrees (a Right Angle).

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In a right angled triangle, the cosine of an angle is:

The length of the adjacent side divided by the length of the hypotenuse.

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In a right angled triangle, the sine of an angle is:
The length of the opposite side divided by the length of the hypotenuse.

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A "pie-slice" part of a circle - the area between two radiuses and the connecting arc of a circle.

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How steep a straight line is.
In this example the slope is 3/5 = 0.6
Also called "gradient".

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Coordinates are a set of values that show an exact position.

Example: the point (12,5) is 12 units along, and 5 units up.

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The "upwards" angle from the horizontal to a line of sight from the observer to some point of interest.

If the angle goes "downwards" it is called an Angle of Depression.

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The value where a straight line crosses the Y axis of a graph.

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The angle between a straight line and the XX - axis is known as the angle of inclination.

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The "downwards" angle from the horizontal to a line of sight from the observer to some point of interest.

If the angle goes "upwards" it is called an Angle of Elevation.

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In a right angled triangle, the tangent of an angle is:

The length of the opposite side divided by the length of the adjacent side.

The abbreviation is tan

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A point where two or more line segments meet. A corner.

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The smallest value.