Sum of Interior Angle

Find the measure of the indicated angle.

Find the measure of the indicated angle.

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

• 45°
• 90°
• 180°
• 360°

A student is trying to construct triangles using four different sets of angles. The angles in each set are given below. Which set will form a triangle?

• 45°, 65°, 70°

• 150°, 110°, 100°

• 50°, 50°, 50°

• 90°, 90°, 90°

What type of angle is shown?

• acute
• obtuse
• right
• straight

What is the value of the missing angle?

• 61
• 50
• 60
• 69

• 146
• 34
• 36
• 136

• 61
• 153
• 27
• 146

Look at the sides of this triangle. What type of triangle is this?

• Scalene

• Isosceles

• Equilateral

• Right-Angle

Look at the sides of this triangle. What type of triangle is this?

• Scalene

• Isosceles

• Equilateral

• Right-Angle