Question

A circular disc is cut along its diameter. Find the perimeter of both the semi-circular discs so formed if radius of the disc is 7/2 CM. ( take = π = 22/7 )​

Answer 1

Answer:

radius of the circulae disc = 7/2 cm = 3.5 cm

circumference of the circular disc = 2πr

= 2*22/7*3.5

= 22 cm

the perimeter of each semi circular shaped disc

= (circumference of the circular disc/2)

+ (diameter of circle)

= (22/2) + (7)

= 18 cm

the perimeter of each curcular shaped disc is 18 cm.

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Answer 2

Answer:

RADIUS = 7

2

PIE = 22

7

PERIMETER OF SEMICIRCLE = πr + 2r

by formula 22 × 7 + 2 × 7

7 2 2

= 154 + 7

14

= 11 + 7

= 18cm

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