Respuesta :

the complete question in the attached figure

we know that
in a right triangle
c²=a²+b²
c=20 ft
a=8ft
b=15 ft
so
c²------> 20²----> 400
and
a²+b²-----> 8²+15²------> 64+225-----> 289
so
400 is not 289
therefore

Part A)
the answer is
Joel is not be able to make a right triangle with his fence

Part B)
if Joel cut the longest piece of fencing in order to make a right triangle
then
a²+b²=289
so
c²=√289-------> c=17 ft

the perimeter of the fence is
17+8+15-----> perimeter=40 ft

if Joel takes 30 sec to install----------> 1 ft of fencing
 X--------------------------------------> 40 ft
x=40*30-----> x=1200 sec------> x=1200/60----> x=20 minutes

Part B)
the answer is

 20 minutes


Ver imagen calculista

Answer: 21 inches

Step-by-step explanation:

A^2+B^2=C^2

A^2+400=841

-400 -400

______________

A^2=441

Find the square root of 441 which is 21. So therefore your answer would be 21 inches.