The second angle of a triangle is twice the first angle. the third angle is 20 degrees more than the first angle. find the first angle

The first angle would be 40 degrees.

All angles in a triangle add up to 180 degrees. (keep that in mind)

(this took me forever, btw)

The first angle would be 32.

32*2= 64

64+20= 84

32+64+84= 180

The key is to find the range in which the number could be derived from.

I hope this helped!

These graph is cross the yaxis and x axis two ways.