Question

All __________ are similar.

A.
right triangles
B.
squares
C.
isosceles triangles
D.
rectangles

Answer 1

This might be wrong but I think it’s D.
Explanation: because there are different kinds of rectangles but they all have similar appearances and a square is a rectangle. But please tell me if I’m wrong :-)

Answer 2

B. squares.

Explanation:

Similar figures have the same shape.

Right triangles, isosceles triangle and rectangles can have different shape.