Rembber
![\sqrt[n]{x^m}=x^\frac{m}{n}](https://tex.z-dn.net/?f=%20%5Csqrt%5Bn%5D%7Bx%5Em%7D%3Dx%5E%5Cfrac%7Bm%7D%7Bn%7D%20%20)
and
so
![\frac{8}{ \sqrt[7]{x^{15}} }= \frac{8}{x^ \frac{15}{7} }=8x^{(\frac{-15}{7})}](https://tex.z-dn.net/?f=%20%5Cfrac%7B8%7D%7B%20%5Csqrt%5B7%5D%7Bx%5E%7B15%7D%7D%20%7D%3D%20%5Cfrac%7B8%7D%7Bx%5E%20%5Cfrac%7B15%7D%7B7%7D%20%7D%3D8x%5E%7B%28%5Cfrac%7B-15%7D%7B7%7D%29%7D%20%20)
and
a circle has a radius of 3. an arc in this circle has a central angle of 60° . what is the length of the arc
2 answers:
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If you look at the attached graphic, you will see that the altitude (or height) of an equilateral triangle is:
Height = side length * sq root (3) / 2
Area = side^2 * sq root (3) / 4
Height = side length * sq root (3) / 2
Area = side^2 * sq root (3) / 4