If θ is the measure of a central angle is a circle of radius RHow can I prove that diameter is the longest cord in the circle?
You can look at the triangles formed by a cord and two radii, then use the triangle inequality.How can I prove that diameter is the longest cord in the circle?
There is a diameter, and here is a lovely little evidence I devised decades ago.How can I prove that diameter is the longest cord in the circle?