Question 56537
The slanted roof on a new house will be shown as 11ft by 20ft  how long is the roof from peak to edge?

Use the Pythagorean Theorem to solve:
a^2+b^2=c^2
a=20ft
b=11ft
c="from peak to edge" or the hypotenuse.
.
20^2+11^2=c^2
400+121=c^2
521=c^2 [Squart each side]
sqrt(521)=sqrt(c^2)
22.83=c