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a,b,c sisi2 segitiga
Misal : a=30, b=40, c=50 tu kan siku2
Jadi :
RL= abc/4. Luas Segitiga
RL = 30.40.50/ 4. (30.40/2)
RL = 60000/ 4. 30. 20
RL= 60000/ 2400
RL = 600/24
RL = 25 cm
=D semoga membantu