Question

I need help with some math

Answer 1

yes what is it?

Answer 2

here are the problems

Answer 3

nope dont know it sorry.

Answer 4

please? anyone? I'm really stressing out.

Answer 5

That's a lot of questions. One at at time, shall we?

Answer 6

For the first question, we have a regular pyramid. This means that the base is a regular polygon- so that triangle base has all equal sides

We want to calculate the surface area

The surface area is the area of each side all added together

so if we take a look at the image they gave us- we have the base of the pyramid and it's a triangle
That triangle has a base of 15 and a height of 13

And then we have three other triangles that form the sides of the pyramid
And these triangles have a base of 15 and a height of 10

So let's calculate the area of the base

The formula for the area of a triangle is

area = 1/2 * base * height

so if the base is 15 and the height is 13

what is the area?

Answer 7

ummmm322.5?

Answer 8

How did you get that?

What numbers did you multiply

Answer 9

umm well it's a triangular base
so

Answer 10

it would be bxlxh

Answer 11

so it would be 3(1/2)13x15x10

Answer 12

No no no

Answer 13

We have to find the area of the triangle base

1/2 * 15 * 13

and then we have three other triangles that all have the same area so

3 * 1/2 * 15 * 10

and then you add those two areas and that would be your surface area

does that make sense?

Answer 14

ohhhh
yeah

Answer 15

well what about the 13?

Answer 16

ok wait i got the first 2 finished

Answer 17

but i don't know how to do the rest

Answer 18

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Mez666
well what about the 13?
\(\color{#0cbb34}{\text{End of Quote}}\)

What do you mean?

Answer 19

never mind

Answer 20

There's too many questions posted that I have no idea which one you're referring to.

If you want to work on another question, close this post and ask a new question

Answer 21

here i'll just send the one i need help on currently

Answer 22

It's the same concept

surface area = area of all the sides added up

you have a square with sides 4.5

what is the area of the square?

and then you have 4 triangles that have a base of 4.5 and a height of 4

what is the area of one triangle with a base of 4.5 and a height of 4?
what would the area of four triangles be? just multiply it by 4


and then add up the area of the square and the four triangles and that's your surface area

Answer 23

the area of one side is 9

Answer 24

the area of one triangle**

Answer 25

what would the area of 4 triangles be?

Answer 26

just multiply that number by 4

Answer 27

36

Answer 28

So that's the area of the 4 triangles

we still need the area of the square

the formula for the area of squares is side * side

so the side 4.5 so the area is going to be 4.5 * 4.5 = ??

Answer 29

56.25?

Answer 30

right?

Answer 31

Yes, that's the final surface area

Answer 32

this is the next problem

Answer 33

Make a new post

Answer 34

mk