Math 7 - Classifying Angles and Triangles

Classifying Angles

100

This angle is less than 90 degrees.

Acute angle

200

This angle is greater than 90 degrees.

Obtuse angle

300

This angle is exactly 90 degrees.

Right angle

400

This angle is exactly 180 degrees.

Straight angle

500

An angle is formed by two rays that share a common endpoint. Name the point where the two rays meet.

Vertex

Comp & Supp Angles

100

When two angles add up to 180 degrees, they are called ______.

Supplementary angles

200

The sum of two angles is 90 degrees.

Complementary angles

300

One angle measure 65 degrees and the other angle measures 45 degrees. Tell if the two angles are supplementary, complementary, or neither.

Neither

400

One angle measures 160.5 and the other measures 19.5 degrees. Tell whether the two angles are complementary, supplementary, or neither.

Supplementary

500

Angle A and Angle B are complementary angles. The measure of Angle B is (5x), and the measure of Angle A is 60 degrees. Find the value of x.

x=6

Classifying Triangles

100

A triangle with three acute angles and three congruent sides

Acute equilateral

200

A triangle with one obtuse angle and two congruent sides

Obtuse isosceles

300

A triangle with three acute angles and no congruent sides

Acute scalene

400

A triangle with one right angle and no congruent sides

Right scalene

500

A triangle with one obtuse angle and no congruent sides

Obtuse scalene

Vertical/Adjacent Angles

100

These angles are opposite angles formed by the intersection of two lines.

Vertical angles

200

These angles share a common vertex, a common side, and do not overlap.

Adjacent angles

300

These angles are congruent to each other, meaning they have the same measure.

Vertical angles

400

Angle Y and Angle Z are adjacent angles. If Angle Y measures 110 degrees, find the measure of Angle Z.

70 degrees

500

Angle F and Angle H are vertical angles. If angle F measures 60 degrees and Angle H measures (12x) degrees, find the value of x.

x=5

Find the Missing Angle

100

Angle 1 is 90 degrees. Angle 2 is 30 degrees. Find the measure of Angle 3.

60 degrees

200

Angle B is 110 degrees. Angle C is 45 degrees. Find the measure of Angle A.

25 degrees

300

Angle R is 65 degrees. Angle S is 60 degrees. Find the measure of Angle T.

55 degrees

400

Angle L is 110.5 degrees. Angle M is 45 degrees. Find the measure of Angle N.

24.5 degrees

500

A triangle is used in the game of pool to rack the pool balls. If two of the angles add up to 120 degrees, find the measure of the third angle.

60 degrees