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Many geometric shapes contain right angles and right-angled triangles.
You may find it helpful to sketch the right angled triangle being used.
Find a right angled trianngle out of a shape and use this example and theorem
xsq =5q +8sq
>xsq =25+64
>xsq =89
>x=89sqroute =9.4 (to 1 d.p)
*the sq is squared and sqroute is canna obvious but its square route
I [...]
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