Question

the perimeter of a semicircular protractor with diameter 10cm

Answer 1

Step-by-step explanation:

perimeter of semicircle =πr+d

Answer 2

perimeter of a semicircular protractor  =  25.7  cm if Diameter = 10 cm

Step-by-step explanation:

perimeter of a semicircular protractor with diameter 10cm

Diameter = 10 cm

Radius = Diameter /2 = 10/2  = 5 cm

perimeter of a semicircular protractor  = Circumference of Semi Circle + Diameter

Circumference of Semi Circle = π R  

R = 5 cm

π = 3.14

=> Circumference of Semi Circle = 3.14 * 5 = 15.7  cm

Diameter = 10 cm

perimeter of a semicircular protractor  = 15.7 + 10

=> perimeter of a semicircular protractor  =  25.7  cm