A quadrilateral has angles that measure 56°, 97°, and 136°. What is the measure of the fourth angle? °

First we must understand that a quadrilateral is equal to 360 degrees altogether.

If we know 3 of the angles of a quadrilateral we can subtract them from 360 to get the fourth angle measurement.

360 - 56 - 97 - 136 = 71

So our fourth angle measurement is 71 degrees.

Good Luck! <3

71 a quadrilateral has a total measure of 360 degrees