Last U4 Review

Front

What is the measure of an angle in a triangle if the other two angles measure 60° and 60°?

Back

The measure of the third angle is 60° because the sum of all interior angles in a triangle is 180°.

Front

What is the relationship between angles BCA and DCE if they are congruent?

Back

If ∠BCA≅∠DCE, then the two angles have the same measure.

Front

TRUE/FALSE: A triangle can have two angles that are both 70° and still be a valid triangle.

Back

TRUE, the third angle would be 40°, making the sum 180°.

Front

What is the sum of all interior angles in any triangle?

Back

The sum of all interior angles in any triangle is 180°.

Front

What does it mean for two segments to be congruent, such as BC≅DC?

Back

It means that the lengths of segments BC and DC are equal.

Front

If a triangle has one right angle, what can be said about the other two angles?

Back

The other two angles must be acute and their measures must sum to 90°.

Front

What is the definition of congruent angles?

Back

Congruent angles are angles that have the same measure.

Front

How do you determine if two triangles are congruent?

Back

Two triangles are congruent if their corresponding sides and angles are 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°.

Front

What is the significance of the statement BC≅DC, AC≅EC in a geometric proof?

Back

It indicates that segments BC and DC are equal in length, as well as segments AC and EC, which can be used to prove triangle congruence.