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jadikan jawaban terbaikya
K = alas + 2.sisi
32 = 12 + 2sisi
20 = 2sisi
sisi = 10 cm
t = √10²-(12/2)²
t = √100-36
t=√64
t=8 cm
LUAS = 1/2.alas x tinggi
Luas = 1/2 x 12 x 8
Luas = 48 cm²