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Natasha1
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Homework Statement
In a diagram, P, Q and R lie on a straight line and angle SQR is a right angle. The lengths PS, SR and RP are a, b and c cm respectively and QR is x cm.
Use algebra to show that x = (b^2 + c^2 - a^2) / 2c
Homework Equations
and attempt at a solution[/B]Do I need to use Pythagoras for this question? I need a prompt, a little help please...
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