Let x be any number such that 0 < x ≤ 45
The a right angled triangle has angles of 90, x and 90-x degrees.
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The combined size of the other two angles of a right triangle is 90 degrees.
45 degrees. they have to be the same angle, because they are opposite equal lengths, and when added together they must equal 90, so as to make the total of the angles 180.
No, that's not possible. Consider these facts: -- all three angles of any triangle always add up to 180 degrees -- all three angles in an equilateral triangle have to be the same size -- a right triangle has a right angle in it; a right angle is 90 degrees An equilateral right triangle would need three right angles in it, and they would add up to 270 degrees. As we said earlier: Impossible.
If a triangle is an isosceles triangle as well as being a right-angled triangle, the size of the two angles (that are not right angles) are 45 degrees.
An obtuse triangle or a right angle triangle. An equilateral is definitely an isoceles triangle * * * * * Not true. An obtuse or right angled triangles can be isosceles. It depends on the sizes of the two smaller angles. An isosceles triangle has two equal angles so a triangle with angles of size [A, (180-A)/2, (180-A)/2] degrees where 90 < A < 180 degrees would be an obtuse angled isosceles triangle. A triangle with angles of size (90, 45, 45) degrees is a right angled isosceles triangle.