tolong jwb soal yang ada di foto yaa pake cara , makasih !

Mapel Math
Bab Kesebangunan

Penyelesaian :
6). Keliling lingkaran
= 2 × phi × r
= 2 × 22/7 × 14 cm
= 88 cm

7). Keliling lingkaran
= 2 × phi × r
= 2 × 3,14 × 9 cm
= 56,52 cm

8). Keliling lingkaran
= 2 × phi × r
= 2 × 22/7 × 21 cm
= 132 cm

9). Jari jari
= ( Keliling ÷ phi ) ÷ 2
= ( 44 cm ÷ 22/7 ) ÷ 2
= ( 44 cm × 7/22 ) ÷ 2
= 14 cm ÷ 2
= 7 cm

10). Jari jari
= ( Keliling ÷ phi ) ÷ 2
= ( 100,48 cm ÷ 3,14 ) ÷ 2
= 32 cm ÷ 2
= 16 cm

Good Luck •_-