Angle measures in Triangles

Front

What is the sum of the interior angles in a triangle?

Back

180 degrees.

Front

What does it mean for two triangles to be congruent?

Back

Two triangles are congruent if they have the same shape and size.

Front

What is the Exterior Angle Theorem?

Back

The exterior angle of a triangle is equal to the sum of the two opposite interior angles.

Front

If ∆ABC≅∆XYZ, what can we say about the corresponding sides?

Back

AB≅XY, BC≅YZ, AC≅XZ.

Front

What is a corresponding angle in triangles?

Back

Corresponding angles are angles that are in the same position in different triangles.

Front

How do you determine if two triangles are congruent using SSS?

Back

If all three sides of one triangle are equal to the three sides of another triangle, they are congruent.

Front

What is the definition of an angle?

Back

An angle is formed by two rays with a common endpoint called the vertex.

Front

What is the relationship between the angles in a right triangle?

Back

In a right triangle, one angle is 90 degrees, and the sum of the other two angles is 90 degrees.

Front

What is the definition of vertical angles?

Back

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

Front

What is the Triangle Sum Theorem?

Back

The Triangle Sum Theorem states that the sum of the interior angles of a triangle is always 180 degrees.