Pre-AP Geometry Chapter 5 Vocab

triangle that has no congruent sides

triangle that only has 2 congruent sides

triangle that has 3 congruent sides, all sides are equal

triangle that has 3 acute angles

triangle that has 1 right angle

triangle that has 1 obtuse angle

triangle that has 3 congruent angles

The sum of the measures of the interior angles of a triangle is 180

The measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles

a statement that can be proved easily given using the theorem

The acute angles of a right triangle are complementary

If two angles of one triangle are congruent to two angles of another triangle, then the third angles are also congruent

If two sides and the included angle of one triangle are congruent to two sides and the included angle of a second triangle, then the two triangles are congruent

If two sides of a triangle are congruent, then the angles opposite them are congruent

If two angles of a triangle are congruent, then the sides opposite of them are congruent

If a triangle is equilateral, then it is equiangular

If a triangle is equiangular, then it is equilateral

If three sides of one triangle are congruent to three sides of a second triangle, then the two triangles are congruent

the common side of two consecutive angles in a polygon

If two angles and the included side of one triangle are congruent to two angles and the corresponding non-included side of a second triangle, then the two triangles are congruent

If two angles and a non-included side of one triangle are congruent to two angles and the corresponding non-included side of a second triangle, then the two triangles are congruent

Corresponding Parts of Congruent Triangles are Congruent

involves placing geometric figures on axes

two congruent sides of an isosceles triangle

angle formed by the legs

third side of an isosceles triangle

two angles adjacent to the base