3.
pythagroen theorem
for a right triangl of legs legnth a and b and hypotnuse c
a^2+b^2=c^2
legs are 3 and height
hypotnuse=legnth of lader=10
h^2+3^2=1^2
h^2+9=100
minus 9 both sides
h^2=91
sqr both sides
h=9.539
h=9.54 ft
4.
area=side^2 for a square
112=side^2
sqrt both sides
√112=side
(√16)(√7)=side
4√7 ft=side
3. 9.54 ft
4. 4√7ft
