Choose the correct alternative :
Which of the following figures are not always congruent?
two circles of same radius
two squares of same side
two line segments of same length
two equilateral △s
Two equilateral △s are only congruent if their sides are equal in length.
Hence, two equilateral △s are not always congruent.
Similar figures are always congruent, whereas the congruent figures are not necessarily similar.
If AB is parallel to CD then △ABO should be congruent to △CDO always.
Arjun: They will be congruent always.
Rahul: They may or may not be congruent.
Choose the correct option.