Question

Straight angle is ____________

a. half of revolution b. one –fourth of revolution

c. one complete of revolution​

Answer 1

Answer:

half of revolution......

Answer 2

$\huge\sf\underline\red{Explanation}$

☆ Measure of straight line is 180°=360/2

☆One complete revolution is 360°

☆Half a revolution is 180°=360/2

☆One fourth revolution is 90°=360/4

Hence the answer is option a Half revolution