Angle in Triangles

• Acute Triangles

• Equilateral Triangles

• Obtuse Triangles

• Right Triangles

Find the missing angle TSR.

• A

• B

• C

• D

What is the sum of interior angles of a triangle?

• 60 degrees

• 90 degrees

• 180 degrees

• 360 degrees

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°

Find the measure of the missing angle.

• 90^o

• 10⁰

• 130^o

• 50^o

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

• 45°

• 90°

• 180°

• 360°

Find the measure of angle ABC.

• 38

• 47

• 40

• 70