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No. An isosceles right triangle is a special case. There are many right triangles which are not isosceles.
A right angled isosceles triangle!
no, although they could as an isosceles triangle has two sides of equal length. So it could be an isosceles right angled triangle but it could also be an isosceles without a right angle, for example /\ this sort of shape.
isosceles are 45-45-90
No. For example a 3, 4, 5 cm triangle is right angled but not isosceles.