Question

Minta bantuan nya dong,jawaban nya sekalian pake cara yaa...
Makasihhh

Answer 1

Diameter lingkaran = √7² + 7²
= √49 + 49
= √98
= √49.√2
= 7√2 cm

keliling lingkaran = πd
= 22/7 * 7√2
= 22√2 cm

Answer 2

Sisi kubus = s = 7 cm
misalkan jari-jari lingkaran = r
r² + r² = s²
2 r² = 7²
r² = 7²/2
r = √7²/2
r = 7/√2
r = 7√2 / 2

K = 2π r = 2 x 22/7 x 7√2 / 2 = 22√2 (b)