Question

Is my answer correct?

Answer 1

The formula for the area of a triangle is:
$\frac{Bh}{2}$
where B is the base of the triangle and h is the height

It appears that the height of the triangle is 5 units (not quite 4.5) and the base is 10 units. 
Multiply these to get 50, and divide by 2 to get 25.

The area of the triangle should be 25 u²

Hope this helps! :)

Answer 2

Yes since the formula is h*b/2 so 4.5*10/2 equals 22.5 aka 22 1/2