Question

WILL MEDAL AND FAN

Answer 1

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Answer 2

Ok, so surface area is literally just the total area of all of the surfaces. You can use the formula \[\large (base *2)+(perimeter*height)\] The base is the base area, the perimeter is the perimeter of the base, and the height is the size of the side adjacent to the base.

Answer 3

Note: The base that you use in surface area formulas is going to be the side that appears on two sides. In this case, the base is the triangle.

Answer 4

Hello? Are you there? @MalhotraChandra

Answer 5

Sorry I'm here now

Answer 6

So the surface area is 58.49?

Answer 7

Can you tell me how you got that?

Answer 8

I added them up

Answer 9

Well what did you get for the base?

Answer 10

18??

Answer 11

Oh wait no 27

Answer 12

I'm so confused

Answer 13

Well the formula for the area of a triangle is \[\large A=\frac{1}{2}*height*base\] For this triangle is the height is 3 and the base is 9.

Answer 14

So 13.5?

Answer 15

Right. Now put 13.5 in as the "base" in the surface area formula. \[\huge 2*base=?\]

Answer 16

27!

Answer 17

I could've gotten that by multiplying 9 and 3 though right? Or do I have to use the formula?

Answer 18

Right. So that's the first half of the formula done. Now we have to figure out the perimeter and the height. Can you find the perimeter of the triangle?

Answer 19

9.49?

Answer 20

And that was because we were multiply the triangle area formula by 2 which will look like \[\large 2*\frac{1}{2}*3*9\] Yes, the 2 and 1/2 are going to cancel out.

Answer 21

Add the sides together so \[\large 3+9+9.49=~?\]