Question

Find the missing side. It’s trigonometry, and I’ve tried this 5 times.

Answer 1

That triangle's upside down but the usual rules hold.

We know the side opposite the 39 degree angle is 10 m and we're asked for the adjacent side. The unlabeled side is the hypotenuse.

That's tangent:


`\tan 39^\circ = (10)/(x)`


`x = (10)/(\tan 39^\circ) \approx 12.35 \textrm{ m}`

Answer B