AB = BC = 30 cm.
Tinggi limas = 36 cm.
BR = 30/2 = 15 cm.
;Panjang BR = Panjang QR.
Pythagoras.
PR^2 = 15^2 + 36^2
PR^2 = 225 + 1296
PR^2 = 1521
[tex]\sqrt{PR^{2} } =\sqrt{1521}[/tex]
PR = 39 cm.
a = 30 cm.
t = PR = 39 cm.
Luas BCP = a x t / 2
Luas BCP = 30 x 39 / 2
Luas BCP = 15 x 39
Luas BCP = 585 cm^2.
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AB = BC = 30 cm.
Tinggi limas = 36 cm.
BR = 30/2 = 15 cm.
;Panjang BR = Panjang QR.
Pythagoras.
PR^2 = 15^2 + 36^2
PR^2 = 225 + 1296
PR^2 = 1521
[tex]\sqrt{PR^{2} } =\sqrt{1521}[/tex]
PR = 39 cm.
a = 30 cm.
t = PR = 39 cm.
Luas BCP = a x t / 2
Luas BCP = 30 x 39 / 2
Luas BCP = 15 x 39
Luas BCP = 585 cm^2.