Working on a Differentiation question- need some advice.
The Question:
A circle has a diameter AB of length 8cm. C is a point on the circumference. Show that the triangle ABC will be isosceles if the perimeter is a maximum and find the maximum perimeter.
My solution so far:
Since length AB is the diameter, then Angle ACB is 90 degrees. We can use Pythagoras Theorem to express the perimeter of this triangle.

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hmmm just guess.. AC = CB ?

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