All equilateral triangles are_____
A = set of all triangles B = set of all right triangles A - B=?
Find all the angles of an equilateral triangle.
Let S= the set of all triangles,P= the set of all isosceles triangles, Q= the set of all equilateral triangles, R= and the set of all right-angled triangles. What do the sets P∩Q and R-P represents respectively?