Respuesta :

The length of the base of a right triangle is 10 m because the area formula for a triangle is BxH/2 (B=Base H=Height) (/2= divide by 2) 
so plugging it in 4m x 10m = 40m
40m/2 = 20m

Answer:

B. Length of the base is 10 m.

Step-by-step explanation:

We are given a triangle having,

Area = 20 m²

Height = 4 m

Since, we know that,

Area of a triangle = [tex]\frac{1}{2}\times Base\times Height[/tex]

i.e. [tex]20=\frac{1}{2}\times Base\times 4[/tex]

i.e. [tex]20=2\times Base[/tex]

i.e. [tex]Base=\frac{20}{2}[/tex]

i.e. Base = 10 m.

Hence, the length of the base is 10 m.