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37 degrees

Step-by-step explanation:

A triangle has to be 180 degrees so you do 53+90 (because it is a right triangle) equals 143

then do 180-143 to get your final angle of 37

37 degrees

Step-by-step explanation:

The degrees of a triangle will add up to equal 180 degrees. A right angle will always be equal to 90 degrees.

Set up an equation:

Variable x = degrees of the acute angle

90 + 53 + x = 180

143 + x = 180

143 - 143 + x = 180 - 143

0 + x = 37

x = 37