diketahui keliling belah ketupat 100 cm dan panjang salah satu diagonal nya48 cm, luas belah ketupat tersebut

Sisi miring = kll ÷ 4 = 100 ÷ 4 = 25
1/2 d2 = √25^2 - √24 = √625 - √576 = √49 = 7
d2 = 7×2 = 14
Luas = 1/2 × d1 × d2
= 1/2 × 48 × 14
= 336 cm^2
^ artinya pangkat

K = 4 × s
100 = 4 × s
s = 100/4
s = 25 cm
d1 = 48 cm
d2 = 2 × [akar (s^2 - (1/2×d1)^2)]
= 2 × [akar (25^2 - (1/2×48)^2)]
= 2 × [akar (25^2 - 24^2)]
= 2 × [akar (625 - 576)]
= 2 × [akar 49]
= 2 × 7
= 14 cm
L = 1/2 × d1 × d2
= 1/2 × 48 × 14
= 336 cm^2