No. For example a 3, 4, 5 cm triangle is right angled but not isosceles.
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No. An isosceles right triangle is a special case. There are many right triangles which are not isosceles.
Yes- but not all isosceles triangles are right triangles. Isosceles means that two sides are the same length, and two angles are the same.
no
isosceles are 45-45-90
Yes.