Question

If the area A of a triangle is 45 m2 (square meters) and the altitude h is 15 m, what's the base b?

Answer 1

Answer:

The base b is 6m

Step-by-step explanation:

The area A of a triangle with base b and height h is given by the formula;

$A=\frac{1}{2}*b*h$

The area of the triangle is given as 45 while the height h is 15. We substitute these known values into the formula above and solve for the unknown base;

$45=\frac{1}{2}*b*15\\\\90=15*b$

We finally divide both sides by 15 to solve for b;

b = 90/15 = 6

Therefore, the base of the triangle is 6 m

Answer 2

Answer:

$b = 6\ m$

Step-by-step explanation:

The area of a triangle is

$A = 0.5b * h$

Where b is the base of the triangle and ha is the height.

In this case we have a triangle with area

$A = 45\ m ^ 2$

and with height:

$h = 15\ m$

So the base of the triangle is:

$45 = 0.5b (15)\\\\b=\frac{45}{15*0.5}\\\\b=6\ m$

Finally the base of the triangle is b = 6 meters