Question

base-? ; height-31. 4 cm ; area of triangle​=1256 cm2​

Answer 1

Answer:

What is its length????

Answer 2

Answer:

base=?

$h=31.4 cm\\a=1256cm^2\\a=1/2*b*h\\1256=1/2*b*31.4\\1256=15.7 b\\1256/15.7=b\\80=b$

I hope you understand this....