Oblicz pole trójkąta równobocznego którego bok ma : -5cm -pierwiastek z 6 cm - pierwiastek z 18 cm. Bardzo proszę o rysunek . Dziękuję; )
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a = 5 cm
Korzystamy z wzoru na pole trójkąta równobocznego
P = [ a^2 * p(3)]/4
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p(3) - pierwiastek kwadratowy z 3
Mamy
P = [ 5^2 * p(3)]/4 = 25 p(3) / 4 = 6,25* p(3)
P = 6,25 * p(3) cm^2
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a = p(6) cm
P = [ ( p(6))^2 * p(3)]/4 = [ 6 * p(3)]/4 = 1,5 *p(3)
P = 1,5* p(3) cm^2
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a = p(18) cm
P = [ ( p(18))^2 * p(3)]/4 = [ 18 * p(3)]/4 = 4,5 *p(3)
P = 4,5* p(3) cm^2
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