Question

Find the surface area of the figure below.

A. 200 in2
B. 88 in2
C. 42.5 in2
D. 85 in2

Answer 1

am i doing the same thing as on the circle one ?

Answer 2

Pretty much... no circles here though ;)

You're the teacher here... what should we do first? (jk, I'll help)

Answer 3

lol i'd hope so ! cause otherwise i'll never be able to be the teacher . xD

Answer 4

pi * 9^2 ?

Answer 5

Why pi? I don't see any circles in that diagram. What shapes are there?

Answer 6

oh .. well .. 9*4*4 ?

Answer 7

I don't understand yet ;)

It looks like you multiplied 9 * 4. Is that the area of a side of the shape?

Answer 8

i really don't understand this one . i have no idea what i have to do . ):

Answer 9

What shape do you see on the sides of that pyramid?

Answer 10

triangles .

Answer 11

Area of a triangle: = 1/2 * base * height

You had the right idea of multiplying by four, though... there are four sides.

Answer 12

So, for the four triangle sides, your area of each side will be 1/2 * 4 * 9
1/2 * 4 * 9 = 18

And there are 4 of those triangle sides, so 4 * 18 = 72

But you still need to add the area of the square base.

Answer 13

where do i go from there then ?

Answer 14

what is the area of the bottom? The shape of the bottom is a square with sides 4...