Question

are the triangles below acute, obtuse, or right?
triangle a
80°
50°
50°
acute
obtuse
right
triangle b
120°
30°
30°
acute
obtuse
right
triangle c
35°
55°
acute
obtuse
right
triangle d
45°
45°
acute
obtuse
right

Explanation:

Step1: Analyze Triangle A

Check all angles: 50°, 50°, 80° (all <90°). So acute.

Step2: Analyze Triangle B

Check angles: 120° (>90°). So obtuse.

Step3: Analyze Triangle C

Check for right angle: has 90° symbol. So right.

Step4: Analyze Triangle D

Check all angles: 45°, 45°, 90° (has 90°). So right.

Answer:

Triangle A: Acute
Triangle B: Obtuse
Triangle C: Right
Triangle D: Right