#1**+2 **

If we drew a line connecting the two vertices that are furthest from each other, we would create two triangles, and by SSS, these triangles would be congruent.

And n° would be the same as the measure of its corresponding angle, which is 142° . So...

n = 142

In every quadrilateral, the sum of the interior angles = 360° , so....

m = 360 - n - 142 - 20 = 360 - 142 - 142 - 20 = 56

m = 56

hectictar Jun 28, 2018

#1**+2 **

Best Answer

If we drew a line connecting the two vertices that are furthest from each other, we would create two triangles, and by SSS, these triangles would be congruent.

And n° would be the same as the measure of its corresponding angle, which is 142° . So...

n = 142

In every quadrilateral, the sum of the interior angles = 360° , so....

m = 360 - n - 142 - 20 = 360 - 142 - 142 - 20 = 56

m = 56

hectictar Jun 28, 2018