Tolong kerjakan pake proses yak :)

Jawaban:

3. L = 1/4 x phi x d²

= 1/4 x 22/7 x 7²

= 1/4 x 22/7 x 49

= 1/4 x 22 x 7

= 1/4 x 154

= 38.5 cm²

4. L = phi x r²

r² = L : phi

= 5024 cm² : 3,14

= 1600 cm²

r = Akar dari L : phi

= Akar dari 1600

= 40 cm

d = r x 2

= 40 x 2

= 80 cm

5. K = phi x d

= 22/7 x d

d = K : phi

= 220 : 22/7

= 220 x 7/22

= 70 cm

L = 1/4 x phi x d²

= 1/4 x 22/7 x 70²

= 1/4 x 22/7 x 4900

= 1/4 x 22 x 700

= 1/4 x 15400

= 3850 cm²