Oblicz pola poniższych trójkątów.plis
a-28cm,19cm
b-38cm,3,2dm
c-7dm,6dm
d-20cm,25cm
e-10m,3m
f-32cm,24 cm
prosze was rozwiążcie.
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P=a*h/2 ---> pole trójkąta
a) a=28cm
h=19cm
P = 28*19/2 = 266 (cm2)
b) a=3,2dm
h=38cm=3,8dm
P = 3,2*3,8/2 = 6,08 (dm2)
c) P = 7 * 6/2 = 21 (dm2)
d) P = 20*25/2 = 250 (cm2)
e) P = 10*3/2 = 15 (m2)
f) P = 32*24/2 = 384 (cm2)