Flight Service Manager at American Airlines, In-flight operations supervisor at US Airways.Past. Flight Attendant at US Airways, English Teacher at Guil Elementary School English Program, English Teacher at LCI Kids Club, Regional...sistente de la Gerencia General at Marsh Rehder, Flight Service Manager at American Airlines, Flight Service Administrative Assistant at...
Acute Angle Definition. An acute angle is an angle whose degree measure is greater than 0 but less than 90. In the above diagram angle 1 is seen smaller than the right angle marked by a square sign. Hence it is an acute angle. Similarly, the angle marked as 2 is called the complementary angle of angle 1.
A triangle must be either acute, right, or obtuse. It also has three interior angles that always total 180 degrees. Because a right triangle has a right angle (exactly 90 degrees), the sum of its two remaining angles must be 90 degrees. These two angles are therefore inferred to be acute. The same holds true for an obtuse triangle, since it has an obtuse angle (measuring more than 90 degrees) that makes the sum of its two other angles be less than 90 degrees. No triangle has only one acute angle, or it wouldn't be a triangle.