Question

Num trapézio as base medem 21 cm e 15 cm e a altura mede 10 cm. Calcule a área do trapézio

Answer 1

A = ( B + b) .h/2

A = ( 21 + 15). 10/2

A = 36 . 5

A = 180 cm²                  ok

Answer 2

$A = \frac{(B + b).h}{2} = \frac{(21 +15).10 }{2} = \frac{360}{2} = 180cm^2$