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Whakaoti mō d
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Tohaina

\pi d=28
He hanga arowhānui tō te whārite.
\frac{\pi d}{\pi }=\frac{28}{\pi }
Whakawehea ngā taha e rua ki te \pi .
d=\frac{28}{\pi }
Mā te whakawehe ki te \pi ka wetekia te whakareanga ki te \pi .