Question

If the permiter of a protractor is 36cm find its area

Answer 1

Given perimeter of protractor(semicircle) = 36cm
⇒ (πd)/2 +d = 36
⇒ [(22/7)+d]/2 + d = 36
⇒ (22d)/14 +d = 36
⇒ (22d + 14d)/14 = 36
⇒ 36d = 36×14
⇒ d  = (36×14)/36
∴ d = 14cm
Diameter= 14cm
Radius = 7cm
Area of semicircle = 1/2  πr²
= (1/2)×(22/7)×(49)   cm²
= 77cm²

Answer 2

I THINK THE ANSWER IS 77 BECAUSE THE RADIUS IS 7 SO ON THE BASIC FORMULA( PI R SQUARE DIVIDED BY TWO)
ANSWER IS 77
IF MY ANSWER IS CORECT MARK IT AS BRAINLY ANSWER