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150 = 1/2 x 15 x t
300 = 15 x t
t = 20 cm
pakai pytagoras : 15,20,25
keliling = 15 +20 + 25 = 60 cm .
jawabannya yang D .
semoga membantu...
150=1/2 15.t
t=300/15
t=20 cm
sisi miring=
=
=
= 25 cm
keliling=a+t+sisi miring
= 15+20+25
= 60 cm
jawaban: D