Question

Find the perimeter of a semicircle whose radius is 49mm?​

Answer 1

Answer:

154

Step-by-step explanation:

Circumference of a semi-circle = πr

Circumference of a semi-circle = πrR= 49

Circumference of a semi-circle = πrR= 49C= πr= 22/7 × 49 = 154

Note: π= 22/7

Note: π= 22/7Note 2: circumference of a circle= 2πr

Note: π= 22/7Note 2: circumference of a circle= 2πrTherefore: C of semicircle= πr