please jawab nomor 13 dan 14.pakai jalan.yg jawab masuk surga

Luas belah ketupat = d1×d2/2
30×d2/2 = 240
D2 = 240/15 = 16 cm

Sisi miring gunakan rumus phytagoras
sisi miring = V15^2 + 8^2 = 17 cm
keliling = 17×4 = 68 cm