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What type of triangle has a vertex angle?

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What type of triangle has a vertex angle?

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Finding the area of an isosceles triangle.

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http://www.moomoomath.com/Finding-the-area-of-a-triangle.html#.Ul861VCsiSo Finding the area of a triangle of an isosceles triangle. The formula for area of a triangle is 1/2 base times height. Step 1. Determine your base Step 2. Find the altitude Step 3. Find the altitude by creaing a right triangle by drawing a line from your vertex Step 4.

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CPCTC is an acronym for corresponding parts of congruent triangles are congruent. CPCTC is commonly used at or near the end of a proof which asks the student to show that two angles or two sides are congruent.

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The Triangle Sum Theorem states that the three interior angles of any triangle add up to 180 degrees

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The obtuse angle is the smaller angle. It is more than 90° and less than 180°. The smaller angle is an Obtuse Angle, but the larger angle is a Reflex Angle. ... Types of Angles Acute Angles Right Angles Straight Angle Reflex AnglesDegrees (Angle) Geometry Index.

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an angle of 90°, as in a corner of a square or at the intersection of two perpendicular straight lines.

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The acute angle is the small angle which is less than 90°. If you choose the larger angle you. will have a Reflex Angle instead: The smaller angle is an Acute Angle, but the larger angle is a Reflex Angle.

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The hypotenuse leg theorem states that any two right triangles that have a congruent hypotenuse and a corresponding, congruent leg are congruent triangles.

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Congruent Triangles - Two angles and an opposite side (AAS) Definition: Triangles are congruent if two pairs of corresponding angles and a pair of opposite sides are equal in both triangles. There are five ways to test that two triangles are congruent.

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ASA Postulate (Angle-Side-Angle) If two angles and the included side of one triangle are congruent to the corresponding parts of another triangle, then the triangles are congruent. In a sense, this is basically the opposite of the SAS Postulate.

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The exterior angle theorem is Proposition 1.16 in Euclid's Elements, which states that the measure of an exterior angle of a triangle is greater than either of the measures of the remote interior angles.

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SAS Postulate (Side-Angle-Side) If two sides and the included angle of one triangle are congruent to the corresponding parts of another triangle, then the triangles are congruent.

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SSS (side, side, side) SSS stands for "side, side, side" and means that we have two triangles with all three sides equal. ... If three sides of one triangle are equal to three sides of another triangle, the triangles are congruent.

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(of a triangle) having two sides of equal length.

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of a triangle) having sides unequal in length.