MATH SOLVE

4 months ago

Q:
# for problems 6-7, find the surface area of the regular rpyramids shown to the nearest whole number. 6.72ft128ft56ft22ft7.1300m2390m650m2628m2

Accepted Solution

A:

6. Base = 4*4 = 16

1 side = 1/2 x 4 x 7 = 14

14 x 4 sides = 56

total: 56 + 16 = 72 ft^2

7.Β

base = 1/2 x perimeter x apathem

base = 1/2*(6*10) * 5sqrt3

base = 259.81 round to 260

1 side = 1/2 x 10 x 13 = 65

6 sides = 65 *6 = 390

total = 390 + 260 = 650 m^2

1 side = 1/2 x 4 x 7 = 14

14 x 4 sides = 56

total: 56 + 16 = 72 ft^2

7.Β

base = 1/2 x perimeter x apathem

base = 1/2*(6*10) * 5sqrt3

base = 259.81 round to 260

1 side = 1/2 x 10 x 13 = 65

6 sides = 65 *6 = 390

total = 390 + 260 = 650 m^2