Oblicz pola trapezu o podanych długościach podstawy a i b oraz wyskokościach H. A ) a = 5 cm b = 6 ,2 cm h = 3 cm B) a = 1,5 dm b = 7 cm h= 4,8 cm C) A = 2,5 M B = 7,5 DM H= 4 DM D) A = 17 MM B = 2,5 CM H = 4 CM Z GÓRY DZIĘKUJE
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Pole na trapez to (a+b) *h /2
A) (5cm+6,2cm)*3 /2 =11,2 * 3 /2 = 33,6 /2 = 16,8cm2
B) (1,5dm+7cm) *4,8 /2 =(15cm+7cm) *4,8cm /2 = 22cm/2 = 11cm2
C) (2,5m +7,5dm) * 4dm /2 = (23dm + 7,5dm) *4dm /2 = 30,5dm *4dm /2 =122dm /2 =61dm2
D) (17mm+2,5cm) * 4cm = (17mm+25mm) * 40mm /2 =42mm*40mm /2 =1680mm /2 =930mm2
Licze na naj :)
Jak cos * to Razy
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