Question

m∠abc = 180°
what type of angle is it?
obtuse
straight
right
acute

Explanation:

An acute angle is less than \(90^{\circ}\), a right angle is exactly \(90^{\circ}\), an obtuse angle is between \(90^{\circ}\) and \(180^{\circ}\), and a straight angle is exactly \(180^{\circ}\). Since \(m\angle ABC = 180^{\circ}\), it fits the definition of a straight angle.

Answer:

straight