The angle of the triangle is 87 and one of the outer corners is 103 find the acute angle.

The adjacent angle of a triangle is equal to the sum of the degree measures of two angles that are not adjacent to it. That is, angle 4 = angle 1 + angle 2. It is known that angle 4 = 103 degrees, and angle 1 = 87 degrees. Then we substitute our numbers into the equality and we get: 103 = 87 + angle 2, angle 2 = 103 – 87 = 16 degrees. Angle 3 = 180 – Angle 4 = 180 – 103 = 77 degrees. Then the angles of the triangle are: 87 degrees, 16 degrees, 77 degrees. All of these corners are sharp.
Answer: 87, 77 and 16 degrees.