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Mathematics 20 Online
OpenStudy (anonymous):

What is the area of the equilateral triangle? Round to the nearest square centimeter. cm2

OpenStudy (anonymous):

OpenStudy (anonymous):

here is the formula 1/2 x base x height

TheSmartOne (thesmartone):

Formula for equilateral triangle \(\sf \Large Area=\frac{\sqrt{3}}{4}side^2\)

OpenStudy (anonymous):

Base x Height. Wouldn't it just be 30x30?

TheSmartOne (thesmartone):

Nope, the height is not 30.

OpenStudy (anonymous):

ohhhh yeah I forgot you said equalateral

OpenStudy (anonymous):

lol

TheSmartOne (thesmartone):

If you want to find the height, use phytagorean theorem to find the height |dw:1431227000254:dw|

OpenStudy (anonymous):

Oh, I see.

TheSmartOne (thesmartone):

But just use the formula I gave you earlier. It's easier and faster (:

OpenStudy (anonymous):

Do I plug in numbers or use the 3 and 4?

TheSmartOne (thesmartone):

the side is equal to 30, so plug it in and solve :)

OpenStudy (anonymous):

When Im done can you check my answer?

TheSmartOne (thesmartone):

Sure :)

OpenStudy (anonymous):

Im so confused xD

TheSmartOne (thesmartone):

\(\color{blue}{\text{Originally Posted by}}\) @TheSmartOne Formula for equilateral triangle \(\sf \Large Area=\frac{\sqrt{3}}{4}side^2\) \(\color{blue}{\text{End of Quote}}\) Plug in \(\sf\Large side=30\)

OpenStudy (anonymous):

I got a lot of numbers lol

TheSmartOne (thesmartone):

After doing multiplication, you should have one number. :P

OpenStudy (anonymous):

Alright Im gonna try it again one sec

OpenStudy (anonymous):

390....?

TheSmartOne (thesmartone):

Correct :)

OpenStudy (anonymous):

REALLY?!

TheSmartOne (thesmartone):

Yup :)

OpenStudy (anonymous):

Whoa.. Hah

OpenStudy (anonymous):

Also can you check my work on one more.?

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