Mathematics
Grade 6
15 min
Triangle Angle-Sum Theorem
Triangle Angle-Sum Theorem
Tutorial Preview
1
A triangle has angles 50° and 70°. What is the third angle?
2
A right triangle has one angle of 40°. Find the missing angle.
3
An isosceles triangle has a top angle of 80°. Find the two base angles.
Sample Practice Questions
Easy
A triangle has angles of 60° and 70°. What is the measure of the third angle?
0.40°
1.50°
2.60°
3.70°
Easy
Two angles in a triangle are 100° and 40°. What is the third angle?
0.40°
1.50°
2.30°
3.60°
Easy
A triangle has angles of 30° and 50°. Find the missing angle.
0.90°
1.110°
2.100°
3.80°
Want to practice and check your answers?
Sign up to access all questions with instant feedback, explanations, and progress tracking.
Start Practicing Free