Question

Find the radius of circle whose arc is 33 cm and its measures is 90 degree on the center.

Answer 1

Given that the arc is 33 cm which subtenants 90°at the centre.
We know that the circle has a complete angle.
Therefore the circle will have 4 right angles and the 33 cm arc subtenants a right angle at the centre.
So the perimeter will be=4×33 cm
=132 cm

Hope it helped.

Answer 2

Given that an arc is 33 cm which subtententer 90 degrees at the centre we know that the circle has a complete angle.therefore tbe circle will have 4right angles and the33cm arc sutenals a right angle at the centre so the perimeter will be=4×33ln=132cm