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OpenStudy (shaleiah):
@DanJS
OpenStudy (mathstudent55):
|dw:1453331132349:dw|
OpenStudy (mathstudent55):
|dw:1453331183745:dw|
OpenStudy (mathstudent55):
The area of the original equilateral triangle equals the area of 6 of the small triangles.
OpenStudy (mathstudent55):
One side of the small triangle is given.
I called that side x. See figure above.
The other side is \(\sqrt 3 x\).
Multiply the given side by \(\sqrt 3\) to find the other side.
Since theses two sides of the small triangle are at right angles to each other, they are a base and height.
Multiply then together and divide by 2 to find the area of the small triangle.
Then multiply that area by 6 to find the area of the large original triangle.
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OpenStudy (shaleiah):
5400?
OpenStudy (danjs):
6 * 1/2 * root(3) * x * x
3*root(3)*x^2
use the length for x