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m=35 m
t²=m²-a²
t²=35²-21²
t²=1225-441
t=√784
t=28 m
Luas taman
=½at
=½×21×28
=294 m²
= akar 1225- 441
= akar 784 = 28 m
luas taman = a x t / 2
= 21 x 28/2
= 21 x 14
= 294 m2