Topic 4: Triangle Congruence

Front

What is a midsegment in a triangle?

Back

A midsegment is a line segment that connects the midpoints of two sides of a triangle. It is parallel to the third side and half its length.

Front

If DE is a midsegment of triangle ABC, what can be said about segments AC and DE?

Back

Segment DE is parallel to segment AC and its length is half the length of AC.

Front

What is the relationship between corresponding angles when two parallel lines are cut by a transversal?

Back

Corresponding angles are equal in measure.

Front

How do you find the perimeter of a triangle?

Back

The perimeter of a triangle is found by adding the lengths of all three sides.

Front

What is the measure of angle 1 if it is given that angle 1 and angle 2 are supplementary and angle 2 measures 136°?

Back

Angle 1 measures 44°.

Front

What type of angle pair are vertical angles?

Back

Vertical angles are angles that are opposite each other when two lines intersect. They are always equal.

Front

If QR is a midsegment of triangle WXY, how do you find the length of side WY?

Back

The length of side WY is twice the length of the midsegment QR.

Front

What is the definition of congruent triangles?

Back

Congruent triangles are triangles that are identical in shape and size, meaning 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

If two angles are alternate interior angles, what can be said about their measures?

Back

Alternate interior angles are equal when two parallel lines are cut by a transversal.