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Proving Lines are Parallel - MathHelp.com - Geometry Help

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For a complete lesson on proving lines are parallel, go to http://www.MathHelp.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn the converse of the parallel line postulate and the converse of each of the theorems covered in the previous lesson, which are as follows.

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In geometry, a horizontal line is one which runs from left to right across the page. It comes from the word 'horizon', in the sense that horizontal lines are parallel to the horizon. The horizon is horizontal. Its cousin is the vertical line which runs up and down the page.

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A vertical line is one the goes straight up and down, parallel to the y-axis of the coordinate plane. All points on the line will have the same x-coordinate. In the figure above, drag either point and note that the line is vertical when they both have the same x-coordinate. A vertical line has no slope.

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In elementary geometry, the property of being perpendicular(perpendicularity) is the relationship between two lines which meet at a right angle (90 degrees). The property extends to other related geometric objects. A line is said to be perpendicular to another line if the two lines intersect at a right angle.

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In geometry, parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch each other at any point are said to be parallel. By extension, a line and a plane, or two planes, in three-dimensional Euclidean space that do not share a point are said to be parallel.

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a surface of which one end or side is at a higher level than another; a rising or falling surface.

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How To Find The Missing Angle More For Angles

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How To Find The Missing Angle More For Angles

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How to Find the Missing Angle in a Triangle

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http://www.mathproblemgenerator.com - How to Find the Missing Angle in a Triangle. For more practice and to create math worksheets, visit Davitily Math Problem Generator at www.mathproblemgenerator.com

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Monterey Institute for Technology and Education Perimeter

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u07_l1_t2_we3 Finding Missing Angles Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education

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the angles that occupy the same relative position at each intersection where a straight line crosses two others. If the two lines are parallel, the corresponding angles are equal.

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When two lines are crossed by another line (called the Transversal): The pairs of angles on one side of the transversal but inside the two lines are called Consecutive Interior Angles.

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of a line) intersecting a system of lines.

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Alternate Exterior Angles. When two lines are crossed by another line (called the Transversal): The pairs of angles on opposite sides of the transversal but outside the two lines are called Alternate Exterior Angles.

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Alternate Interior Angles. When two lines are crossed by another line (called the Transversal): The pairs of angles on opposite sides of the transversal but inside the two lines are called Alternate Interior Angles.

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In geometry, parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch each other at any point are said to be parallel. By extension, a line and a plane, or two planes, in three-dimensional Euclidean space that do not share a point are said to be parallel.

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Answer= Symmetry

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How to recognize a conditional equation.

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Converse of Pythagorean Theorem - MathHelp.com - Math Help

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For a complete lesson on Converse of the Pythagorean Theorem, go to http://www.MathHelp.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn the Converse of the Pythagorean Theorem, which states that if the sum of the squares of the lengths of two sides of a triangle is equal to the sum of the square of the third side, then the triangle is a right triangle.

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The law of syllogism takes two conditional statements and forms a conclusion by combining the hypothesis of one statement with the conclusion of another. Here is the general form: P → Q. Q → R.

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1. The Commutative Property of Addition

2. The Commutative Property of Multiplication

3. The Associative Property of Addition

4. The Associative Property of Multiplication

5. The Distributive Property

6. The Additive Identity Property

7. The Additive Inverse Property

8. The Multiplicative Identity Property

9. The Multiplicative Inverse Property

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an opinion or conclusion formed on the basis of incomplete information.

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The part after the "if": you get good grades - is called a hypotheses and the part after the "then" - you will get into a good college - is called a conclusion.

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Switching the hypothesis and conclusion of a conditional statement and negating both. For example, the contrapositive of "If it is raining then the grass is wet" is "If the grass is not wet then it is not raining." Note: As in the example, the contrapositiveof any true proposition is also true

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opposite or contrary in position, direction, order, or effect.

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If two lines and a transversal form corresponding angles that are congruent, then the lines are parallel. If two lines and a transversal form alternate interior angles that are congruent, then the lines are parallel.

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a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.

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Geometry - Given a linear pair of angles solve for the missing angle - Math solver

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I show how to solve math problems online during live instruction in class. This is my way of providing free tutoring for the students in my class and for students anywhere in the world. Every video is a short clip that shows exaclty how to solve math problems step by step.

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How to Find the Distance Between Two Points - How to Use the Distance Formula

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How To Find The Midpoint Using The Midpoint Formula

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either of two angles whose sum is 180°.

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either of two angles whose sum is 90°.

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A linear pair of angles is formed when two lines intersect. Two angles are said to be linear if they are adjacent angles formed by two intersecting lines. The measure of a straight angle is 180 degrees, so a linear pair of angles must add up to 180 degrees.

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Adjacent angles are two angles that have a common vertex and a common side. The vertex of an angle is the endpoint of the rays that form the sides of the angle.

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the angle bisector theorem is concerned with the relative lengths of the two segments that a triangle's side is divided into by a line that bisects the opposite angle. It equates their relative lengths to the relative lengths of the other two sides of the triangle.

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Sometimes you need to find the point that is exactly midway between two other points.

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is derived from the Pythagorean theorem. To find the distance between two points (x1,y1) and (x2,y2), all that you need to do is use the coordinates of these ordered pairs and apply the formula pictured below.

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the midpoint of the line segment"

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It is comprised of a bunch of points between those two end points. An easier way of stating the segment addition postulate is that if point B lies on line segment AC, then AB + BC will equal AC.