Three angles of a quadrilateral are 98 72 and 105 what is the exterior angle of the fourth angle

Alrighty, the sum of all the angles of a quadrilateral, as you might know, is 360 degrees. So since you're given all the 3 angles, you can find the 4th one by subtracting the sum of all the 3 angles from 360.

which when evaluated gives,

Now that's the interior angle not the exterior. To get the exterior we need to subtract the angle from 180 which gives:

which evaluates to .

Here's the diagram if needed :P

confedracy

supported slavery

upheld the supremacy of federal laws

believed states should be able to nullify federal laws

union

wanted to abolish slavery

supported high tariffs

upheld the supremacy of federal laws