tolong ya temen temen

14. Lj = 90/360 × 3,14 × 10 × 10
= 1/4 × 314
= 78,5 cm
L segitiga = 10 × 10 × 1/2
= 50 cm
L tembereng = 78,5 - 50 = 28,5 cm

15. sudut pusat = 2 × sudut keliling
82 = 2 × sudut keliling
41 ° = sudut BDC