Answer:
b=1399.43
Explanation:
We know our A side (length CH) is 3960
First we have to find our c side or length CE
Add 3960 and the altitude of 240 which equals 4200
then use the Pythagorean Theorem of A squared + B squared = C squared
if you plug that in its
3,960 squared + B squared = 4200 squared
If you calculate that its
15,681,600 + b squared = 17,640,000
then you want to isolate the variable
youll want to subtract 15, 681,600 from both sides of the = sign
this gives you b squared = 1,958,400
then youll have to find the square root of both
the square root of B squared is B
the square root of 1,958,400 is 1399.43
so B = 1399.43