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Mapel : Matematika
Bab : Bangun Datar

20 cm = 4x

triple Phythagoras

3x,4x,5x

----> 4x = 20 cm
3x = .....

a = 3x = 3/4 × 20 = 15 cm
t = 4x = 20 cm

L = 1/2 × a × t
L = 1/2 × 15 × 20
L = 150 cm^2

( A )