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= s.s + 4.a.t/2
= 14.14 + 4. 14.25/2
= 196 + 700
= 896 cm2
tambahan catatan : 25 didapatkan dari phytagoras 24,7,25
t=akar 24" + 7"
t=akar 576 + 49
t=akar 625
t=25cm
L=L alas +4Lsegitiga
L=sxs + 4 x 1/2 x a x t
L=14x14 + 4x1/2x14x25
L= 196 + 700
L=896 cm2