Question

Tentukan Luas Bangun Berikut!

Answer 1

A) L 1/4 lingkaran = 1/4 x 22/7 x 25 = 19,62 cm2
b) L 3/4 lingkaran = 3/4 x 3,14 x 6 x 6 = 84,8 cm2
c) L 1/2 lingkaran + L persegi panjang
= (25 x 14) + (1/2 x 22/7 x 7 x 7/
= (350) + (77)
= 427 cm2

Answer 2

L=1/4×π×r×r
=1/4×3,14×5×5
=1/4×15,70×5
=1/4×78,5
=19,625
L=3/4×π×r×r
=3/4×3,14×6×6
=3/4×18,84×6
=3/4×113,04
=28,26×3
=84,78
L1=p×l
=25×14=350
L2=1/2×π×r×r
=1/2×22/7×7×7
=22×7
=154÷2=77
L=L1+L2
=350+77=427.