a).Keliling lingkaran
[tex]\pi \times d \\ \frac{22}{7} \times 28 \: cm \\ 88 \: cm \\ \\ b). Luas \: \frac{1}{4} \: lingkaran \\ \frac{1}{4} \times \pi \times r \times r \\ \frac{1}{4} \times \frac{22}{7} \times 14 \: cm \times 14 \: cm \\ 154 \: {cm}^{2} [/tex]
5a) K = πd
= (22/7(28)
= (22(28/7)
= (22(4)
= 88 CM
5b) LP = (1/4(π(r²)
= (1/4(22/7(28/2)²
= (1/4(22/7(14(14)
= (1/4(22/7(196)
= (1/4(22(196/7)
= (1/4(22(28)
= (1/4(616)
= 616/4
= 154 CM²
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a).Keliling lingkaran
[tex]\pi \times d \\ \frac{22}{7} \times 28 \: cm \\ 88 \: cm \\ \\ b). Luas \: \frac{1}{4} \: lingkaran \\ \frac{1}{4} \times \pi \times r \times r \\ \frac{1}{4} \times \frac{22}{7} \times 14 \: cm \times 14 \: cm \\ 154 \: {cm}^{2} [/tex]
5a) K = πd
= (22/7(28)
= (22(28/7)
= (22(4)
= 88 CM
5b) LP = (1/4(π(r²)
= (1/4(22/7(28/2)²
= (1/4(22/7(14(14)
= (1/4(22/7(196)
= (1/4(22(196/7)
= (1/4(22(28)
= (1/4(616)
= 616/4
= 154 CM²