In quadrilateral ABCD, side AD is 4 cm 6 mm larger than side AB, and AB = BC = CD = 13 cm.

In quadrilateral ABCD, side AD is 4 cm 6 mm larger than side AB, and AB = BC = CD = 13 cm. Find the perimeter of quadrilateral ABCD.

Decision:

In order to calculate the perimeter of a quadrilateral ABCD with sides AB, BC, CD and DA, you need to add each of its sides together:

P = AB + BC + CD + DA, where,
P is the perimeter of the quadrangle.

Side AD fold 4 cm. 6 mm. larger than side AB, then side AD = 13 cm + 4 cm. 6 mm. = 17 cm. 6 mm. ;

P = 13 + 13 + 13 + 17.6 = 56.6 = 56 cm 6 mm. ;

or shorter, you can do this: P = 13 * 3 + 17.6. The result will be the same.

Answer: The perimeter of the quadrangle ABCD is 56 cm. 6 mm.