Question

Pake cara ya itu disuruh cari keliling

Answer 1

Keliling :
19 + 19 + 26 + kell 1/2 lingkaran + 26
90 + π × d
90 + 22/7 × 21
90 + 66
156 cm

Answer 2

K bola =πd
=22/7×21×½
=33
k=26+26
=52
k segitiga = 19+19
= 38
k seluruh = 33+52+38
=123