The measurement of one angle of a right triangle is 61°.

what is the measurement of the third angle?

The third angle = 90 -61 = 29

hope that helps

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.