Question

What's the lateral are of pentagonal pyramid.

Answer 1

*area

Answer 2

A regular pentagonal pyramid?

Answer 3

yes

Answer 4

Lateral Area = The sum of the areas of the lateral (vertical) faces

Answer 5

or 1/2 the perimeter times the slant height

Answer 6

the slant height being the altitude of one of the lateral triangular faces

Answer 7

The formula is: 1/2 × Perimeter × Base Length. This is because the sides are always triangles and the triangle formula is bh/ 2.

Answer 8

So, 8*5=40,40/2=20,then 20*16?

Answer 9

sorry and the perimeter being the perimeter of the base

Answer 10

We are not given perpensdicular height we are given slant height so we have to use pythogaras theorem to calculate the perpendicular height

Answer 11

perpendicular*

Answer 12

I got the height around 15.49

Answer 13

16^2- 8^2 =x^2
256-64=x^2
192 = x^2
x=14 (approx)

Answer 14

now use the given formula

Answer 15

I got 56

Answer 16

It is definitely 320.

Answer 17

That's what I got when I used your thing, and it's an answer choice.

Answer 18

Using my formula, 1/2 x perimeter of the base x slant height, that would be 1/2 x (5x8) x 16.

Answer 19

Thanks. :)