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432.2=2/3x²
864.3/2=x²
√1296=x
36=x
d1=36 dm
d2=2/3 d1= 2/3.36=24 dm
keliling
c²=18²+12²
c=√324+144
c=√468
c=6√13
keliling
k=4s=4.6√13=24√13 dm
432 =2/6x²
432.3=x²
1296=x²
x = √1296
x=36
d1 = 36 dm
d2 = 2/3 . 36
= 24 dm
sisi² = 12²+18²
sisi = √468
= 6√13
keliling = 4s
= 4 x 6√13
= 24√13 dm