can a triangle have two right angles and why or why not
A. no because there needs to be a third angle
B. yes because it would be a right angle
C. no because a triangle must have an obtuse angle
D. yes because 90+90 = 180
C. no because a triangle must have an obtuse angle
A triangle by definition has three angles. If two of those angles are right angles, then the sum of all three angles would be 180 degrees, which means the third angle would also have to be 90 degrees. Therefore, there would not be an obtuse angle in the triangle, as an obtuse angle is greater than 90 degrees.