Question

are the triangles below acute, obtuse, or right?
triangle a
triangle b
triangle c
triangle d
acute
obtuse
right
acute
obtuse
right
acute
obtuse
right
acute
obtuse
right

Explanation:

Step1: Recall Triangle Types

• Acute: All angles < 90°.
• Obtuse: One angle > 90°.
• Right: One angle = 90°.

Step2: Analyze Triangle A

Angles: 30°, 40°, 110°.
110° > 90° → Obtuse.

Step3: Analyze Triangle B

Angles: 60°, 60°, 60°.
All < 90° → Acute.

Step4: Analyze Triangle C

Angles: 56°, 59°, 75°.
All < 90° → Acute.

Step5: Analyze Triangle D

Has a right angle (90°) → Right.

Answer:

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

(For each triangle, the selected option is:
Triangle A: Obtuse
Triangle B: Acute
Triangle C: Acute
Triangle D: Right)