Triangles
Supplementary Angles
Angle Relationships
Finding Missing Angles
Vocabulary
100

When two angles in one triangle are congruent to two angles in another triangle this is the relationship between the triangles.

What are similar triangles

100

Find the supplement of 82 degrees

What is 98 degrees?

100

Angles on opposite sides of the vertex when lines intersect

What are Vertical Angles?

100

A pair of angles are same-side interior angles.  One of the angles measures 68 degrees.  Find the measure of the other.

What is 112 degrees?

100

The sum of angles that equal 90 degrees

Complementary angles

200

Triangle A has angles measuring 50 degrees and 100 degrees.  The measure of the 3rd angle in the triangle.

What is 30 degrees?

200

A 28-degree angle is supplementary to an angle that measures 2x.  The value of x.

What is 76?

200

Angles that are on opposite sides of the transversal and inside parallel lines. 

What are alternate interior angles?

200

Two parallel lines crossed by a transversal form 8 angles.  One of the angles measures 78 degrees. Find the measure of the angle vertical to this given angle.

What is 78 degrees? 

200

Lines that are the same distance apart that will never intersect

Parallel Lines

300

Find the measure of an exterior angle of a triangle whose non-adjacent angles measure 25 and 79 degrees.

What is 104 degrees?

300

Two angles are supplementary.  One angle measures x degrees.  Another angle measures 2x degrees. The actual measure of each angle

What are 60 and 120 degrees?

300

Angles that are outside of a triangle, and adjacent to the interior angles.

What are exterior angles?

300

An exterior angle of a triangle measures 110 degrees.  One of the nonadjacent interior angles measures 50 degrees.  Find the measure of the other nonadjacent angle.

What is 60 degrees?

300

Two angles that are formed by two intersecting lines that share a vertex, but not a side.

What are vertical angles?

400

When two triangles are similar, their angles are congruent and their corresponding sides are .....

What is proportional?

400

These two types of angles are supplementary

What are same side interior and same side exterior angles?

400

Angles that lie on the same side of the transversal and on corresponding sides of parallel lines. 

What are corresponding angles?

400

Two interior angles of a triangle measure 33 and 89 degrees. Find the measure of the third interior angle.

What is 58 degrees?

400

Define supplementary angles

the sum of angles that equal 180 degrees

500

Two triangles are similar. Their sides have a ratio of 2:3.  A side on the smaller triangle is 8 inches.  The length of the corresponding side of the larger triangle.

What is 12 inches

500

The following two angles are supplementary angles 2x and 3x - 5 What is the measurement of each angle?

74 degrees and 106 degrees

500

Angle pairs formed when a transversal crosses parallel lines are always one of these two things.

What are congruent or supplementary?

500

Two Supplementary angles, one is 2x-5 the other is 3x, find the value of x.

What is 37?

500

Triangles that have two pairs of corresponding angles congruent are this.

What is similar?