Angles of Triangles

3.2 Angles of Triangles

The really big idea, and something that most of us are already familiar with is that the sum of the interior angles is 180 degrees.

Multiple Choice

What do the angles in an equilateral triangle measure?

• 30, 60, 90
• 45, 45, 90
• 60, 60, 60
• 35, 55, 90

Multiple Choice

If two of the angles of a triangle are 30 and 70 degrees, the third angle measures...

• 80
• 100
• 60
• 90

Multiple Choice

What is the third angle of a triangle whose 1st angle is 34 and 2nd angle is 101?

• 32
• 39
• 45
• 54

Multiple Choice

Find the measure of the missing angle.

• 90^o
• 10⁰
• 130^o
• 50^o

Multiple Choice

The sum of all angles in a triangle is ______.

• 45°

• 90°

• 180°

• 360°

Multiple Choice

Solve for x.

• 5
• 12
• -7
• -6

Multiple Choice

What is the measure of the missing angle?

• 82
• 43
• 55
• 180

Multiple Choice

Find the measure of the missing angle.

• 47

• 57

• 53

• 133

The exterior angle theorem can come in very handy at times!

Multiple Choice

Which of the following angles can you add together to equal angle d? 

• Angle a and Angle b
• Angle b and Angle c
• Angle a and Angle c
• Angle a and Angle b and Angle c

Multiple Choice

Solve for x.

• A

• B

• C

• D

Multiple Choice

Solve for x.

• A

• B

• C

• D

Multiple Choice

Find the measure of the missing angles.

• A

• B

• C

• D

Multiple Choice

Find the measure of the missing angles.

• A

• B

• C

• D

Multiple Choice

Find the measure of the missing angles.

• A

• B

• C

• D

Multiple Choice

Find the measure of the missing angles.

• A

• B

• C

• D

Multiple Choice

Which of the following terms best describes Angle d? (remember that it's outside)

• Remote interior angle
• Corresponding angle
• Exterior angle
• Interior angle