Question

Find the diameter of the circle for BC = 17 and DC = 30. Round to the nearest tenth. The diagram is not drawn to scale.
https://www.connexus.com/content/media/461958-3292011-34843-PM-1262076942/res00000/ppg/examview/S_GEOMB_06_06_06_Unit_6B_Test/mc010-1.jpg
52.9
69.9
35.9
15.2

Answer 1

make a right triangle:

Now, by the Pythagorean theorem, (x+17)^2 = 30^2 + x^2
x^2 + 34x + 289 = x^2 + 900
34x = 611
x = 17.97. x is the radius, so the diameter is about 35.9