Yes, those are the 45,45,90 degree triangles.
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a right angled triangle with the remaining angles both being 45 degrees will be a rightangled triangle and an isosceles triangle.
An isosceles triangle is a triangle that has two sides of equal length. A right triangle has an interior angle of 90 degrees. A right isosceles triangle has both characteristics. The 90 degree angle will be the angle formed by the sides of equal length.
They both have right angles (obviously) But the scalene has no sides the same length but the isosceles has 2 equal sides
A trapezium or a triangle. If the pyramid is a right pyramid then they would both be isosceles.
Because it has 2 equal base angles and 2 equal sides It is the only triangle that is both an isosceles and right angle triangle