Question 658096
The sum of all angles in a triangle is always 360.

One angle can be represented by x.
The other is then x+24.

If the other angle is 100, then these two must equal 260 when added together.

x + (x+24)= 260
x + x + 24= 260
2x + 24= 260
2x + 24 - 24= 260 - 24
2x + 0= 236
2x = 236
2x*1/2 = 236*1/2
x*2*1/2 = 236*1/2
x*1 = 118 
x = 118 

If x or 118 deg is one angle, the other is x+24 or 142 deg.







You could also start with 

x + (x+24) + 100 = 360 
and you would get the same result.