Question

1_ calcule a area
a- triangulo com base 8 cm e altura 4,2 cm

Answer 1

At = 8×4,2 ÷ 2
At = 33,6 ÷ 2
At = 16,8 $cm^{2}$

Answer 2

at = b x h  / 2
at = 8 x 4,2  / 2
at = 33,6  / 2
at = 16,8 cm2