hours and minutes
What is an acute angle
A acute angle is less than 90°
What is a Straight Angle
Straight Angle is 180° exactly
What is an Obtuse angle
A obtuse angle is greater than 90° but
less than 180°
81
9 ÷ 72
8
8x9
72
4x3x9
108
A right angle is 90° exactly
A 360-degree angle is a complete angle and it is equal to a revolution. It is also called a full angle.