Question

# A square $$PQRS$$ is of side $$10\, \text{cm}$$ each. Write the length of its diagonal $$PR$$.

Solution

## Applying Pythagoras theorem in $$\triangle PSR$$:$$PR^{2}=PS^{2}+SR^{2}$$$$PR^{2}=10^{2}+10^{2}$$$$PR^{2}=100+100$$$$PR=10\sqrt{2}\ \text{cm}$$Mathematics

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