Question

Need help with a total surface area problem for a pyramid. *Picture in Comments*

Answer 1

I know the formula for a standard pyramid, but where does "A" come into play?

Answer 2

since you are given the height of the face (h) you don't need to worry about a in this problem.

Answer 3

a is just there to show you that it is a right pyramid so all faces have same h and same base

Answer 4

so you know the answer right?

Answer 5

So the base, is 8? Why are there two 6's? I almost got it I think. Just a little confused.

Answer 6

no the altitude is 8

Answer 7

what shape is the base?

Answer 8

Rectangular.

Answer 9

ok so whats the area of the base?

Answer 10

area of a rectangle

Answer 11

36

Answer 12

correct

Answer 13

so 36 + (area of a face * 4)

Answer 14

= total area

Answer 15

whats the area of a face?

Answer 16

what shape is each face?

Answer 17

triangle

Answer 18

ok whats the formula for area of a triangle?

Answer 19

25.62?

Answer 20

correct so total area is base area + (area of a face * 4) because there are 4 face, so its 36 + (25.62 * 4)

Answer 21

Awesome 138.48. Once again, thanks a lot!

Answer 22

yw, just remember to break each figure up into familiar shapes and get area of each then add them up

Answer 23

I never would have thought of that before. Thanks.

Answer 24

np