Geo - Triangle Proofs

Front

What do rigid motions preserve?

Back

Rigid motions preserve angle measure and side lengths.

Front

What is statement #1 in triangle proofs?

Back

BC≅DC, AC≅EC

Front

What is statement #2 in triangle proofs?

Back

∠BCA≅∠DCE

Front

What is the reason for statement #4?

Back

Vertical Angles.

Front

What is reason #1 in triangle proofs?

Back

Given.

Front

What is the Reflexive Property?

Back

The Reflexive Property states that a quantity is equal to itself (e.g., AB≅AB).

Front

What are Alternate Interior Angles?

Back

Alternate Interior Angles are angles that lie on opposite sides of the transversal and inside the two lines.

Front

What is the definition of congruent triangles?

Back

Triangles are congruent if all corresponding sides and angles are equal.

Front

What is the Angle Bisector Theorem?

Back

The Angle Bisector Theorem states that the angle bisector divides the opposite side into segments proportional to the adjacent sides.

Front

What is the definition of vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect; they are always congruent.