ok I tried something..
then the perimeter is equal to:
therefore:
to find the extremes:
To check wether the extreme is max or min:
can someone check if I'm right please :P
A halfcircle with r = 14 cm has a trapeze drawn inside it.
What is the largest possible perimeter of the trapeze (check the image).
I have to express the perimeter using only 1 variable (i was thinking c) and then derivate the perimeter and equal it to 0 to get the extremes..
how to express the perimeter using only c?