Angles & Triangles Review

Angles & Triangles Test Review

By Debbie Motsinger

​​Angles are classified by their measure.

​Classify angles.

Multiple Choice

Classify this angle.

• Acute

• Right

• Obtuse

• Straight

Multiple Choice

Classify this angle.

• Acute

• Right

• Obtuse

• Straight

Multiple Choice

Classify this angle.

• Acute

• Right

• Obtuse

• Straight

Multiple Choice

Classify this angle.

• Acute

• Right

• Obtuse

• Straight

Open Ended

Give the measure of the angle (just the numbers).

Adjacent angles are a pair of angles that share a vertex and a side.

​

​Adjacent Angles

A pair of angles whose sum is 90 degrees.

Complementary Angles

A pair of angles whose sum is 180 degrees.

Supplementary Angles

Multiple Choice

Are these complementary angles or supplementary angles?

• Complementary

• Supplementary

• Neither

Multiple Choice

Are these complementary angles or supplementary angles?

• Complementary

• Supplementary

• Neither

Vertical angles are formed when two lines cross. The angles directly across from each other are vertical angles. Vertical angles are congruent (have the same measure).

​Vertical Angles

Multiple Select

Which pair(s) of angles are vertical angles? Select all that apply.

• $$\angle1\ \&\ \angle2$$

• $$\angle1\ \&\ \angle4$$

• $$\angle4\ \&\ \angle8$$

• $$\angle6\ \&\ \angle7$$

Multiple Choice

What is the value of b?

• 44

• 134

• 46

• 64

Multiple Choice

What is the value of b?

• 51

• 141

• 39

• 90

Multiple Choice

What is the measure of the supplement of a $$32\degree$$ angle?

• $$32\degree$$

• $$58\degree$$

• $$148\degree$$

• $$48\degree$$

Multiple Choice

What is the measure of the complement of a $$10\degree$$ angle?

• $$170\degree$$

• $$80\degree$$

• $$70\degree$$

• $$10\degree$$

To classify triangles by their side lengths determine if the triangle has:

No congruent sides - Scalene
Two sides congruent - Isosceles
Three sides congruent - Equilateral

​​Classify by sides

​To classify triangles by angle measures determine if the triangle has:

Three acute angles - Acute
One obtuse angle - Obtuse
One right angle - Right

​​Classify by angles

Multiple Choice

Classify the triangle by sides and angles.

• Acute Isosceles

• Acute Scalene

• Right Scalene

• Right Isosceles

Multiple Choice

Classify the triangle by sides and angles.

• Obtuse Isosceles

• Acute Scalene

• Right Scalene

• Obtuse Scalene

Multiple Choice

Classify the triangle by sides and angles.

• Obtuse Isosceles

• Acute Scalene

• Right Isosceles

• Right Scalene

A unique triangle is formed when:

The sum of any two sides is greater than the length of the third side.

Multiple Choice

Can a triangle have side lengths 7, 9, 28?

• Yes

• No

Multiple Choice

Can a triangle have side lengths 13, 30, 22?

• Yes

• No