Two angles in a triangle add up to 98 degrees . what is the size of the third angle ?

First you must know that the sum of the interior angles of a triangle are 180.  Once you know that, you just simply add 98+x=180 (you can use an variable as you see fit, doesn't need to be x). And then you simply solve for x by dividing 98 on both sides leaving you with 82.

2

Step-by-step explanation:

The easiest way to explain slope is the units up between each point on the line, divided by the units across. For this graph:

(-5,-6) and (0,4)

(y2 - y1) / (x2-x1)

4-(-6) = 4+6 = 10

0-(-5) = 0+5 = 5

10/5 = 2

Hope this helped!