Question

10. Find the perimeter of
(i) a regular pentagon of side 8 cm,
(ii) a regular octagon of side 4.5 cm,
(iii) a regular decagon of side 3.6 cm.​

Answer 1

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(I) perimeter = 40 cm

side = 8cm

A.t.q

p= 5a = 5(8) = 40cm( a= side)

(2) perimeter = 36cm

side = 4.5 cm

a.t.q

p= 8 a = 8(4.5) = 36 cm

(3) perimeter = 36cm

side = 3.6 cm

a.t.q

p= 10a = 10( 3.6) = 36.0 cm

Answer 2

Answer:

(I) perimeter = 40 cm

side = 8cm

A.t.q

p= 5a = 5(8) = 40cm( a= side)

(2) perimeter = 36cm

side = 4.5 cm

a.t.q

p= 8 a = 8(4.5) = 36 cm

(3) perimeter = 36cm

side = 3.6 cm

a.t.q

p= 10a = 10( 3.6) = 36.0 cm

Step-by-step explanation:

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