All squares are rectangles, but not all rectangles are squares
True or False

True

Explanation:

Because all squares have four right angles and satisfy the definition for rectangles, they can all also be called rectangles. On the other hand, not all rectangles have four congruent sides, so not all rectangles can also be called squares.

true

Explanation:

not all rectangles have four congruent sides, so not all rectangles can be called squares