Find the unknown angle measure of a triangle that contains an angle measuring 113 degrees and another that is 29 degrees.

Question

I need help sooo bad!

Stuck on this question forever.

Answer 1

The sum of all the angles in a triangle is 180 degrees.

 

Since you know what two of the angles (113 and 29), to find the unknown angle, x, all you have to do is add them together and subtract that from the total number of degrees in a triangle (180).

 

x=180 - (113 + 29) 

Answer 2

Remember that the sum of the angles in a triangle is 180°.

 

Since the ones you know about add up to 142, then the third angle must make up the rest -- that's 180 - 142 = 38°