A quadrilateral has two right angles. The measure of the third angle is 73°.

What is the measure of the fourth angle?

The sum of the quadrilateral should be 360 degrees.

We have 3 angle measures given; two ninety degree angles, and one 73 degree angle.

90+90+73 = 253

Then 360-253 = 107

Therefore, the measure of the fourth angle is 107 degrees

360 - (90 + 90 + 73)

360 - 253

= 107 degrees

to check if the answer is correct, add the numbers together, if it equals 360, then it is right.

so, 90 + 90 + 73 + 107

=360 degrees