Which of the following is not a reason used in this proof?
Reflexive
Vertical angles are equal.
Definition of perpendicular.

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

The figure below shows rectangle abcd and the triangle eca on a coordinate plane.which of the following expressions represents the perimeter of triangle of triangle eca in units