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