exam Maths Puzzle Numerical Ability

PQR is an isosceles triangle such that , QP=QR=13cm and the altitude PS=12cm . Find the length of PR ? PLS HELP . Thanks

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exam Other Question
Factor each expression a^2(b-c)-16b^2(b-c) Prove that and explain that x/a+y/b=1 has x intercept a and y intercept b