No. To be a "right" triangle, one angle has to be 90 degrees, but the other two angles can be anything as long as the measures of all three angles add up to 180 degrees. For example, you can have a 45 - 45 - 90 right triangle.
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An isosceles triangle has two sides and angles that are equal, causing it to have exactly a line of symmetry through it. A right triangle has one angle that is 90 degrees. An isosceles right triangle will always have one angle that is 90 degrees, while the other two angles will be 45 degrees.
It is a scalene triangle other than a right angle triangle
no
A triangle can never include a right angle and an obtuse angle together in it.
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.