Question

Geometry

Answer 1

@welshfella

Answer 2

fist find the area of a slanting triangle

area = 1/2 * base * height

what is the length of the base and height of these triangles

Answer 3

they are both written on the diagram

Answer 4

7
4.8

Answer 5

No, 7 is the length of the base - but the we want the height of one of the 5 triangles on the side of the pyramid.

Answer 6

4.8 is the length of the apothem of the pentagonal base of the pyramid

Answer 7

35.7

Answer 8

what is that?

Answer 9

- the area of one of the side triangles?

if so thats correct

Answer 10

1/2*7*10.2

Answer 11

ok so there are 5 of those right?

Answer 12

Yes

Answer 13

so thats an area of 5 * 35.7 for the sides of the pyramid

Answer 14

Now we need to find the area of the base

Answer 15

as you see we can split it up into 5 trangles with bas 7 and height 4.8
so using the same formula as before we can find the area of each triangle

Answer 16

16.8

Answer 17

right so multiply that by 5

then add it to the total area of the side triangles and we have the answer.

Answer 18

OK?

Answer 19

16.8*5+178.5=262.5

Answer 20

yes thats what i got too

Answer 21

Thank you for your help, Welsh.

Answer 22

yw