Question

There are three triangles, A, B, and C. Their angles are given. Which of the following is a right triangle?

Angles of triangle A: 45°, 55°, and 80°

Angles of triangle B: 40°, 50°, and 90°

Angles of triangle C: 32°, 107°, and 41°

• A. Triangle B
• B. Triangle C
• C. Triangle A
• D. None of the above.

Answer 1

The correct option is A Triangle B

In a right triangle, one angle must be 90°.
Only in triangle B, we have one angle equal to 90°. So, triangle B is a right triangle.
Hence, option b is the correct answer.