What does ' mean?
ie. triangle abc is congruent to triangle a'b'c'
The symbol ' is called a prime symbol, and it is commonly used in mathematics and other fields to indicate a related but distinct variable or object. In the context you provided, the prime symbol is used to designate the corresponding points or sides of a congruent triangle.
In the statement "triangle abc is congruent to triangle a'b'c'", the prime symbol is used to distinguish the corresponding parts of the two triangles. For example, 'a' corresponds to 'a', 'b' corresponds to 'b', and 'c' corresponds to 'c'. This notation helps to establish a clear relationship between the two triangles.
To understand the meaning of other symbols or notations in mathematics, it is helpful to study the specific subject area and consult relevant textbooks or online resources. Additionally, seeking clarification from teachers or professors can provide further insights into the specific usage of symbols in different contexts.