Question

Find the surface area for the right prism.

Base = 10m
Height of the Base = 12m
Height = 12m

Answer 1

Here is a picture of the problem.

Answer 2

u hv 3 rectangle. right?

Answer 3

u hv 2 triangle

Answer 4

Yes, am I supposed to split them in half?

Answer 5

lenght of ur rectangle is 12m nd width is 10 m

Answer 6

The surface area will be the sum of the areas of each side. I think you might need to assume the ends are isosceles in which case you have two 5-12-13 triangles back-to-back.

Answer 7

now area of 1 rectangle is 12m*10m

Answer 8

I calculated 120m.

Answer 9

At first, I thought I was supposed to split the triangle in half, so that each one has a base of 5 (10/2). But there's still one side missing, and I don't know how to find it.

Answer 10

120m^2

Answer 11

120m^2=14400.

Answer 12

so the total area of 3 rectangle is 3*120=360m^2

Answer 13

right?

Answer 14

Yes.

Answer 15

now we hv to find out the area of tringle

Answer 16

area of a triangle=1/2*base*height

Answer 17

60?

Answer 18

ares of a triangle=1/2*10*12=60m^2

Answer 19

ya u r right

Answer 20

now tell me the total area of ur two triangle

Answer 21

120m?

Answer 22

now just add total area of ur 2 triangle with total area of ur rectangle

Answer 23

no

Answer 24

480m^2?

Answer 25

ya u r successful

Answer 26

Thank you!

Answer 27

u r most welcome

Answer 28

Uh, no. The three rectangles are (12x10, 12x13, and 12x13) The two triangles do add up to 120 m^2, though, so that is right.

Answer 29

You could use the Pythagorean Theorum and the isoceles assumption to arrive at the other edge lengths being equal to 13.