Ann began her homework at 3: 55 p. m. she spent 15 minutes on her first assignment, and 40 minutes on her second assignment. at what time was she finished with both assignments?

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: