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a. L = s x s
= 25 x 25
= 625 m²
b. K = 4 x s
= 4 x 25
= 100 m
2.) L = 144
L = s x s
144 = s²
s = √144
= 12 cm
K = 4 x s
= 4 x 12
= 48 cm
3.) p = 14 cm
l = 8 cm
L = p x l
= 14 x 8
= 112 cm²
K = 2 ( p + l )
= 2 ( 14 + 8 )
= 2 ( 22 )
= 44 cm
4.) K = 56 cm
p = 18 cm
K = 2 ( p + l )
56 = 2 ( 18 + l )
56 = 36 + 2l
2l = 56 - 36
l = 20/2
l = 10 cm
L = p x l
= 18 x 10
= 180 cm²
b.4s=4x25=100
2. panjang sisi= sxs=144
akar pangkat dari 144 adalah 12
keliling=4s=4x12=48
3. Luas = pxl= 14x8 =112
Keliling=2(p+l)=2(14+8)=2x22=44
4. 56=2(18+n)
56=36+2n
56-36=2n
20=2n
n=10
jadi, lebarnya 10 cm.
Luas=pxl
=18x10
=180 cm2