Question 224727
A vertical pole is to be supported by three wires. Each wire is 13 yards long and is anchored 5 yards from the base of the pole. How far up the poles will the wires be attached? 
Here is how I have tried approaching it:
I drew a vertical line and then 3 more lines to form a square. after this I drew a diagonal line cutting through the square.
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You don't need a square.  Draw a vertical line for the pole, then a point 5 yards from the base.  The wire goes from that point to the pole, and it's 13 yds long.  13 is the hypotenuse of a right triangle.