Which statement can be used to prove that a given parallelogram is a rectangle? the diagonals of the parallelograms are congruent.
the diagonals of the parallelogram are perpendicular.
all the sides of the parallelogram are equal in measure.
the angles of the parallelogram are congruent.

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.

Find the value of the variable and the length of each secant segment.

Nine more than four times a number is the same as one less than twice the number. find the number?