Nomer 24&25……….

24.10cm

25.prisma

maaf kalo salah

24.
L=1/2 phi r2
=1/2 . 3,14 . 20.20
=628 cm2

25.
L = (a+bxt/2) + (axt/2)
= (20+25×12/2) + (20×20/2)
= 270 + 200
= 470 cm2