Fred’s Problem – HSF.TF.B.7

My wife’s uncle recently came to me trying to find the missing angle of a right triangle. He knew the side adjacent to the angle was 12 inches, and the side opposite the angle was 3.5 inches but he forgot how to figure out the missing angle.

It turns out to be an easy problem. We ended up using the inverse tangent function to find the missing angle. Tangent, if you recall, is the ratio of the opposite side / adjacent side, or in other words the opposite side length divided by adjacent side length.

Inverse tangent, which on your calculator looks like tan-1, takes that number and gives you an angle. So we divided 3.5 by 12 to 0.2916, then we took the inverse tangent of 0.2196 and that gave us an angle of 16.26 degrees.

It’s as simple as that.

© Copyright 2016 I will solve that! All rights reserved. http://www.iwillsolvethat.com

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s