Answer:
9ft. (B)
Step-by-step explanation:
Pythagoras theorem( a²+ b²= c²)
=a²+4²=10²
a²+16=100
a²=100-16
a²=84
a=√84
=9.1
approx. =9
64.43 cm2 :)
look and download the file i gave to u
2, 3 and 7,8