Step-by-step explanation:
5+7=12 books all together
Answer: 2
Step-by-step explanation:

slant height(h) = 16.3ft
Base side = 20ft

Perimeter of base = 4(base side) = 4(20) = 80ft
Angle 5 is vertical to angle 3.
Answer:
13 units
Step-by-step explanation:
D is at (1,6) and C is at (-4,-6)
The distance is found by
d = sqrt(( y2-y1)^2+ (x2-x1)^2))
= sqrt( ( -6-6)^2 + (-4-1)^2)
= sqrt( -12^2 + -5^2)
= sqrt( 144+ 25)
= sqrt( 169)
= 13