This will contain important key words
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| Triangle Sum Theorem | The sum of the angle measures of a triangle is 180 degrees
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| Polygon Angle Sum Theorem | The sum of the measures of the interior angles of a convex polygon with n sides is (n-2)180 degrees
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| Exterior Angle Theorem | The measure of an exterior angle of a triangle is equal to the sum of the measures of its remote interior angles
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| Isosceles triangle | triangle with at least 2 congruent sides
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| Congruent sides of a triangle are called | legs
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| Angle formed by legs of triangle are | vertex angles
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| Side opposite of vertex angle is | base
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| Angles that have a base as a side are | base angles
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| Isosceles Triangle Theorem | If 2 sides of a triangle are congruent, then the 2 angles opposite the sides are congruent
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| Equilateral Triangle Theorem | If a triangle is equilateral, then it is equiangular
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| Converse of the Equilateral Triangle Theorem | If a triangle is equiangular, then it is equilateral
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| Triangle Inequality Theorem | The sum of any 2 side lengths of a triangle is greater than the 3rd side length
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| Side-Angle Relationships in Triangles | If 2 sides of a triangle are not congruent, then the larger angle is opposite the longer side
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| Angle-Side Relationships in Triangles | If 2 angles of a triangle are not congruent, then the longer side is opposite the larger angle
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| Circumcenter Theorem | The perpendicular bisectors of the sides of a triangle intersect at a point that is equidistant from the vertices of the triangle
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| Angle Bisector Theorem | If a point is on the bisector an of angle, then it is equidistant from the sides of the angle
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| Converse of the Angle Bisector Theorem | If a point in the interior of an angle is equidistant from the sides of the angle, then it is on the bisector of the angle.
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| Incenter Theorem | The angle bisectors of a triangle intersect at a point
that is equidistant from the sides of the triangle
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