Triangle Proofs (1B)

Front

What are Alternate Interior Angles?

Back

Angles that lie between two parallel lines and on opposite sides of a transversal.

Front

What is the Reflexive Property?

Back

A property stating that any quantity is equal to itself, often used in proofs.

Front

What does ∡EDA≅∡DCB signify?

Back

It indicates that angle EDA is congruent to angle DCB.

Front

What is the first statement in the reason column of a proof?

Back

Given.

Front

What does ∠BCA≅∠DCE indicate?

Back

It shows that angle BCA is congruent to angle DCE.

Front

What are Vertical Angles?

Back

Angles that are opposite each other when two lines intersect; they are always congruent.

Front

What is an Angle Bisector?

Back

A line or ray that divides an angle into two equal parts.

Front

What is the definition of a Segment Bisector?

Back

A line, ray, or segment that divides another segment into two equal parts.

Front

What is the purpose of a proof in geometry?

Back

To provide a logical argument that demonstrates the truth of a geometric statement.

Front

What does it mean for two angles to be congruent?

Back

It means they have the same measure.