Question

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

Explanation:

An angle of \(180^{\circ}\) is defined as a straight angle. An obtuse angle is greater than \(90^{\circ}\) but less than \(180^{\circ}\), a right angle is \(90^{\circ}\), and an acute angle is less than \(90^{\circ}\). So, based on the definition of angle types, \(m\angle ABC = 180^{\circ}\) is a straight angle.

Answer:

B. straight