Triangles - Interior & Exterior

An angle that is exactly 90 degrees.

• right
• acute
• obtuse
• straight

The Triangle Sum Theorem states that the sum of all angles in a triangle is ______. 

• 45°
• 90°
• 180°
• 360°

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

Find the measure of the missing angle.

• 90^o
• 10⁰
• 130^o
• 50^o

Find the measure of the indicated angle.

• 95

• 85

• 35

• 45

What is the measure of angle b?

• 36^o

• 56^o

• 63^o

• 117^o

Which of the following sets of angles DO make a triangle?

• 80, 40, 55

• 38, 64, 75

• 41, 56, 83

• 25, 89, 40

What is the value of the missing angle?

• 90

• 100

• 20

• 120

What is the value of x?

• 38

• 57

• 76

• 85