Question

A pyramid has a square base that is 160 m on each side. What is the perimeter of the base in kilometers?
A. 0.0256 km

B. 0.00064 km

C. 0.64 km

D. 3.2 km

Answer 1

What is the perimeter of the base in meters?

Answer 2

160m

Answer 3

the perimeter is all of the sides added up

Answer 4

how does one convert it to kilometers though?

Answer 5

there are 1000meters to a kilometer right? we use dimensional analysis and "cancel"
the units

\(\large 160\cancel{m}*\frac{1km}{1000\cancel{m}}\)

Answer 6

So is it D.? Please excuse my stupidity...

Answer 7

lol no problem. I'm not going to give the answer tho.

step 1. find the perimeter of a square where one side = 160m
step 2. convert perimeter to km

Answer 8

Oh okay, that would be 0.16 Kilometers?

Answer 9

160m=0.16km

but what does that mean? We want the perimeter which is the addition of all 4 sides, not just one side

Answer 10

the perimeter would .64! right?

Answer 11

0.16+0.16+0.16+0.16
OR
0.16*4=0.64km

nice nice nice

Answer 12

YASSSS! Thanks a million!