Congruency of shapes

2 triangles are congruent if and only if all pairs of corresponding sides and angles are congruent

two polygons whose corresponding sides and angles are congruent when you name you must name corresponding verticals in order

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

If three sides of one triangle are congruent to three sides of another triangle, then the triangles are congruent.

If two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the triangles are congruent.

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

has at least two congruent sides and two congruent angles

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

If a line bisects the vertex angle of an isosceles triangle, then the line is also the perpendicular bisector of the base

A point where two or more straight lines meet.

Therom that proves a theorom

If a triangle is equilateral, then the triangle is equiangular

If a triangle is equiangular, then the triangle is equilateral.

If the hypotenuse and a leg of one right triangle are congruent to the hypotenuse and a leg of another right triangle, then the triangles are congruent.

1. There are two right triangles

2. The triangles have congruent hypotenuses

3. There is one pair of congruent legs

the side of a right triangle opposite the right angle