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If AB is the diameter of a circle and P another point on the circumference then Euclidean geometry tells us that angle APB = 90 degrees. Use this fact to show that the equation of the cricle whose diameter has endpoints A (j,k) and B (m,n) is (x-j)(x-m) + (y-k)(y-n) = 0 thanks

can you smarrt people help me with this question? a) By repeated application of factoring by the difference of squares, prove the identity (2ab)^2 - (a^2 + b^2 - c^2)^2 = (a+b+c)(a+b-c)(a-b+c)(-a+b+c) B) Let triangle ABC be any triangle, and let s=1/2(a+b+c) be the semiperimeter...