ABC is a right triangle, rt angled at C. let BC=a, CA=b, AB=c and P be the length of the perpendicular from C on AB. prove that (1

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ABC is a right triangle, rt angled at C. let BC=a, CA=b, AB=c and P be the length of the perpendicular from C on AB. prove that (1) PC = ab (2) 1/p^2=1/a^2 + 1/b^2

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