The answer is:
The explanation of this exercise is shown below:
1. You have the following expression given in the problem above:
2. By the exponents properties, when you multiply powers with the same base, you must sum the exponents. In this case the base is , therefore, you must sum the exponents.
3. The result of the sum is 6, therefore, must be 4:
c. 5 units
because if ABC and cda are congruent then that means they are the same and since AD and BC are across each other they thay would be the same.