Question

Find the perimeter and area of the given figures.

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Answer 1

Step-by-step explanation:

i)

the given figure is a half semi circle

so perimeter=1/4*2*pi*r+d

=1/2*22/7*14+28

=50cm

Area=1/4*pi*r²

=1/4*22/7*14*14

=154cm²

ii)

Per=l+b+pi*r+pi*R

=14+21+(22/7*7)+(22/7*21/2)

35+22+33

=90cm

Area=lb+1/2pi*r²+1/2pi*R²

=294+(1/2*22/7 *7*7)+(1/2*22/7*21/2*21/2)

=294+77+173.25

=549.25cm²

iii)

Per=2l+2pi*r

=32+2*22/7*14

=32+88

=120cm

Area=lb+pi*r²-pi*r²

=lb

=16*28

=448cm²

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Answer 2

Answer:

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Step-by-step explanation:

(I) 90°-14cm =180°

=90+14= 180°

= 104°-180°=-76

(2) 14 - 21=180°

14+21=180°

35°-180°=145

(3) 28-16=180°

=28+16=180°

= 44°-180°=136°