Which of the following are straight angles?

Angle I is definitely straight angle as it is equals to 180°.

As for angle II, it is not a straight angle. This is because this angle is not equals to 180°.

Angle III is definitely not a straight angle.

Angle IV is a straight angle.

Clearly, only I and IV are straight angles. Hence, the answer is A.

Join our FB group to download ZapZapMath Free today!

Join our Facebook Group