Question

A man looks at the top of a building. He is 3 metres from the base and the building is 20 m tall. Find the distance from his point to the top of the building 'x'.

Answer 1

Hi there!
Any ideas on where to start?

Answer 2

not really :/

Answer 3

Here we would use the Pythagorean theorem
Which is
\[\huge~\rm~a^2+b^2=c^2\]

Answer 4

ok so x^2 = 20^2 + 3^2?

Answer 5

Yep now continue to solve

Answer 6

20^2=?

Answer 7

I'm not sure how to figure that part out

Answer 8

20^2=20*20=?

Answer 9

oh i'm dumb lol 400

Answer 10

you're not dumb we all learn at different paces :)
Next,3^2=?

Answer 11

6

Answer 12

3*3=?
Remember its 3^2

Answer 13

oh 9

Answer 14

so then it would be 409?

Answer 15

yep!
Now we have
\[\huge~\rm~x^2=409\]
Any ideas on how to cancel out the square?

Answer 16

do I find the square root?

Answer 17

Perfect :-)
\[\huge~\rm~\bf~\sqrt{x^2}=\sqrt{409}\]

Answer 18

ok so that would be 20.2237484162

Answer 19

tysm for your help! :)

Answer 20

perfect make sure you round that though and your welcome <3