Whakaoti mō a
a=\frac{P-2l}{2}
Whakaoti mō P
P=2\left(a+l\right)
Tohaina
Kua tāruatia ki te papatopenga
2a+2l=P
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.
2a=P-2l
Tangohia te 2l mai i ngā taha e rua.
\frac{2a}{2}=\frac{P-2l}{2}
Whakawehea ngā taha e rua ki te 2.
a=\frac{P-2l}{2}
Mā te whakawehe ki te 2 ka wetekia te whakareanga ki te 2.
a=\frac{P}{2}-l
Whakawehe P-2l ki te 2.
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