# Thread: How much will it cost?

1. ## How much will it cost?

The fencing cost $2.50 per foot. The three angles given are 90 degrees (2) and 128 degrees the two lengths given are 50ft on the very top and on the far left side it's 30ft Help! So lost I though I would break it in half to two seperate triangles and do pythagorean theorem 2. Originally Posted by livelaughlove16 The fencing cost$2.50 per foot.

The three angles given are
90 degrees (2)
and 128 degrees

the two lengths given are

50ft on the very top
and on the far left side it's 30ft

Help! So lost
I though I would break it in half to two seperate triangles and do pythagorean theorem
Split the trapezoid into a rectangle and a right triangle. You know the lengths of the sides of the rectangle, and you know the upper angle of the triangle ($\displaystyle 128^\circ-90^\circ$), so you can use simple trigonometry to find the length of the opposite side; the Pythagorean Theorem will then give the length of the hypotenuse.