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karena diagonal persegi sama maka
5x = 3x + 8
2x = 8
x = 4
3.
K = 2p + 2l
40 = 24 + 2l
2l = 16
l = 8
jadi luasnya 8 x 12 = 96
4
karena POQ = 1/4 x 360
POQ = 6y
1/4 x 360 = 6y
y = 15
5x = 3x + 8
2x = 8
x = 4
panjang diagonal : 5(4) = 20 cm
3.
2(p+l) = 40
p=12
2(12+l)=40
12+l = 20
l = 8
luas = p x l
luas = 12 x 8 = 96 cm^2
4.
sudut POQ = 6y = 90 derajat
y = 90/6 = 15 derajat