mohon dijawab ya yg nomer 3

keliling = 13 + 13 + 20 + 20 = 66 cm
L = d1 x d2 / 2
   = 24 x 21 / 2
   = 12 x 21
   = 252 cm

AB² = AO² + OB²
AB² = 16² + 12²
AB² = 256 + 144
AB² = 400
AB = √400
AB = 20 cm

OC² = CD² - OD²
OC² = 13² - 12²
OC² = 169 - 144
OC² = 25
OC = √25
OC = 5 cm

K = 2 (AB + CD)
K = 2 ( 20 + 13) cm
K = 2 × 33 cm
K = 66 cm

L = 1/2 × AC × BD
L = 1/2 × (16 + 5) × 24 cm²
L = 21 × 12 cm²
L = 252 cm²