Question

find the perimeter of the adjoining figure which is the semicircle including diameter​

Answer 1

Answer:

Step-by-step explanation:

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Answer 2

Answer:

Perimeter of the given figure is 51.4cm

Step-by-step explanation:

Given,

Diameter of this semicircle is 20 cm.

Perimeter of any figure = sum of lengths of all external boundaries.

Here,

= > Sum of external boundaries = [ Perimeter of circle of radius 20 cm ) / 2 ] + length of diameter

= > Perimeter of this figure = ( 2πr ) / 2 + 2( r ) cm { where r represents the radius }

= > Perimeter of this figure = πr + 2r cm

= > Perimeter of this figure = 20 / 2( π + 2 ) cm

Depending on the value of π, { π = 3.14 }

= > 10( 3.14 + 2 ) cm = 10( 5.14 ) cm

= > 51.4cm

Therefore, perimeter of the given figure is 51.4cm

If radius is 20 cm.

Perimeter = π( 20 ) + 2( 20 ) cm = 20( 3.14 + 2 ) cm = 20( 5.14 ) cm = 102.28 cm.