Tlg ya nomor 2 aja cpet respon nha

Luas daerah di arsir = L 1 – L 2
L1 = trapesium
L = a+b : 2 × t
58 + 42 : 2 × 21
100 : 2 × 21
50 × 21
420 cm
L 2 = 1/2 lingkaran
L = 1/2 × phi x r x r
1/2 x 22/7 × 21 × 21
11 × 3 × 21
33 × 21
693 cm