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luas
= 1/2 × d1 × d2
= 1/2 × 16 × 12
= 96 cm^2
no.2
kll = 4 × sisi
52 = 4 × sisi
sisi = 52/4
sisi =13 cm
d1 = 24cm
d2 = 2 × akar(13^2 - 12^2) = 2 × akar (169-144) = 2 × akar 25 = 2 × 5 = 10 cm
luas
= 1/2 × d1 × d2
= 1/2 × 24 × 10
= 120 cm^2
^2 artinya kuadrat
2
= 16 x 12
2
= 96cm²
2) keliling = 4 x s
52 = 4 x s
s = 52 : 4
= 13cm
Panjang diagonal lainya = √ 13² - 12²
= √ 169 - 144
= √ 25
= 5cm x 2 = 10cm
Luas = d1 x d2
2
= 24 x 10
2
= 120cm²