Question

Find x and y. 11. 12. X 10 3 9 4 13. 4 14. 15 LO X 2 y © Glencoe/McGraw-Hill. 353

Answer 1

11)

From the diagram above, using Pythagoras theorem

`\begin{gathered} x^2=12^2-y^2\text{ ---------(1)} \\ \text{That is considering the big triangle ABC} \end{gathered}`
`\begin{gathered} x^2=3^2+z^2 \\ \text{That is considering the first small triangle} \end{gathered}`