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Mathematics 16 Online
OpenStudy (anonymous):

Just want some hints as I want to figure this out - suppose you inscribe a triangle inside a circle of radius 2cm use calculus to find largest area possible for this triangle :)

OpenStudy (anonymous):

@hartnn

OpenStudy (anonymous):

@iambatman

OpenStudy (anonymous):

@Jemurray3

OpenStudy (anonymous):

Things I have been pushing in my head equation of circle is x^2+y^2=4 Also 1/2bh for area of triangle

OpenStudy (anonymous):

inscribe triangle all angles are the same (60) so sides length

OpenStudy (anonymous):

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OpenStudy (anonymous):

So if all same a for sides equilateral triangle so area =root3/4*s^2 ?

OpenStudy (anonymous):

herons theorem s=(a+a+a)/2=3/2a

OpenStudy (anonymous):

area=sqr(3/2a*(3/2a-a)^3) area=sqr(3/2a*(3/2a-2/2a)^3)...........add 2/2 in second term =sqr(3/2a*(a/2)^3)=a^2/4sqr(3)

OpenStudy (anonymous):

|dw:1416164164433:dw|

OpenStudy (anonymous):

area=(a^2 sqr(3))/4=((2sqr(3))^2*sqr(3))/4=4*3*sqr(3)/4=3*sqr(3)

OpenStudy (anonymous):

\[area=3\sqrt{3}\]

OpenStudy (anonymous):

|dw:1416170512876:dw|

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