What is the perimeter of the quadrilateral rectangle with. 25cm up and down and 8 cm across
because there are two pairs of parallel sides,
p = 2(25) + 2(8) = 66
also, "quadrilateral rectangle" is redundant, since ALL rectangles are quadrilaterals.
To find the perimeter of a rectangle, you need to add up the lengths of all four sides.
In this case, you mentioned that the rectangle has a height (up and down) of 25 cm and a width (across) of 8 cm.
Since a rectangle has two pairs of congruent sides, the opposite sides are equal in length. Therefore, the length of the other side opposite to the 25 cm height is also 25 cm.
To calculate the perimeter, you can add up all the sides of the rectangle:
Perimeter = 25 cm + 8 cm + 25 cm + 8 cm
Simplifying this equation, the perimeter is:
Perimeter = 66 cm