Three interior angles of a quadrilateral have measures of 100degree,120degree, and 80 degree. Find the fourth angle measure. The fourth angle measure is..

The fourth angle = 60°

Step-by-step explanation:

the sum of the interior angles of a quadrilateral is 360°.

The fourth angle = 360° - 100° - 120° - 80° = 60°

answer: no

step-by-step explanation: because the big angle will spread away the 2 side that it is on and make the opposite side even longer.