mohon dijawab yaa yang nomer 3

Bab Bangun Datar
Matematika SMP Kelas VII

layang-layang
AD = √(AO² + (1/2 x BD)²)
AD = √(16² + (1/2 x 24)²)
AD = √(256 + 144)
AD = √400
AD = 20 cm

CO = √CD² - (1/2 x BD)²)
CO = √(13² - (1/2 x 24)²)
CO = √(169 - 144)
CO = 5 cm

1] keliling = 2 x (AD + DC)
keliling = 2 x (20 + 13)
keliling = 2 x 33
keliling = 66 cm

2] luas = 1/2 x AC x BD
luas = 1/2 x (16 + 5) x 24
luas = 12 x 21
luas = 252 cm²