layang2 panjang AC=20 CM dan lebar BD=24 CM jika kelilingnya=66 CM maka luasnya....

Luas layang-layang
= 1/2 × diagonal 1 × diagonal 2
= 1/2 × AC × BD
= 1/2 × 20 cm × 24 cm
= 240 cm^2

luas layang layang
L = 1/2 x d1 x d2
= 1/2 x AC x BD
= 1/2 x 20 x 24
= 1/2 x 480
L = 240 cm2