Question

which triangle is obtuse?

Explanation:

Step1: Recall obtuse - angle definition

An obtuse - angle is an angle greater than 90° and less than 180°. An obtuse - triangle has one obtuse angle.

Step2: Analyze each triangle

• For the first triangle with angles 53°, 60°, 67°: All angles are less than 90°, so it is an acute - triangle.
• For the second triangle with a right - angle (90°) and angles 38°, 52°: It is a right - triangle.
• For the third triangle with angles 35°, 44°, 101°: Since 101°>90°, it is an obtuse - triangle.
• For the fourth triangle with angles 43°, 58°, 79°: All angles are less than 90°, so it is an acute - triangle.

Answer:

The triangle with angles 35°, 44°, 101° is obtuse.