At most two: 45 degrees(deg) and 45 deg. Of course, there may be no equal angles, e.g. 30, 60 and 90 deg. As long as the angles add up to 180 deg and one is one right angle (90 deg) while the other two add up to 90 deg, the triangle is a right triangle.
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A triangle has no right angles when it is not a right angle triangle as for example as in the case of an equilateral triangle that has 3 equal 60 degree angles.
a 'SCALENE' triangle. ; No equal sides, and no equal angles. An ISOSCELES triangle has two equal sides and two equal angles. An EQUILATERAL tringle has three equal sides and three equal angles all at 60 degrees. A RIGHT ANGLED triangle has one right angle (90 degrees) in it.
It is an isosceles right angle triangle that has two equal sides which has two 45 degree angles and a 90 degree angle.
Yes. A right triangle is a triangle where one angle is a right angle. If two out of three angles are right angles, then it's an isosceles triangle. If all three angles are right angles, then it is an equilateral triangle.
A right angle triangle can be scalene. Such a triangle has one right angle, two other unequal angles and no equal sides