Question

An isosceles triangle has a base of 4 and a height of x+3. If the area is 10, what is the value of x?

Answer 1

The area of a isosceles triangle:
S=(bh)/2, where b is for base (=4) and h is for height (=x+3)
We get the equation:
10=(4*(x+3))/2
10=(4x+12)/2
4x+12=20
4x=8
x=2