An acute triangle has all acute angles (less than 90 degrees)
An obtuse triangle has one obtuse angle, more than 90 deg. and less than 180 deg
28 + 58 = 86
180 - 86 = 94
therefore, this is an obtuse triangle
Measure of two angles of a tringle are 28 and 58. Classify triangle by it's angle.
1 answer