Oblicz pole trójkąta o podstawie "a" i poprowadzonej na tę podstawę wysokości "h", jeśli:
a) a = 5cm i h = 14cm
b) a= 21cm i h = 8 cm
c) a = 4,6 cm i h = 4cm
d) a= 8cm i h = 2 i 1/2cm
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a)
P = 1/2*5*14 = 70/2 = 35 cm^2
b)
P = 1/2 * 21 * 8 = 168/2 = 84 cm^2
c)
P = 1/2 * 4,6 * 4 = 1/2 * 184/10 = 184/20 = 9 4/20 = 9 1/5 = 9,2 cm^2
d)
P = 1/2 * 8 * 2 1/2 = 8/2*5/2 = 40/2 = 20 cm^2
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