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= 1/2 * 14 * d2
= 7 * d2
7d2 = 336
d2 = 336 / 7
d2 = 48 cm
336=14×d2/2
336=7×d2
d2=336/7
d2=48 cm
mencari sisi
√7²+24²
√49+576
√625
25 cm
kll=4s
=4.25
=100 cm