One side of the rectangle is 8cm. The second side is 3 times larger than the first, and the third is 7 centimeters less

One side of the rectangle is 8cm. The second side is 3 times larger than the first, and the third is 7 centimeters less than the second, 9 cm more than the fourth. Calculate the perimeter of the quadrangle.

Given:

quadrangle;

1 side = 8 cm;

2 side = 3 times more than 1 side;

3rd side = 7 cm less than the second and 9 cm more than the fourth;

Find the perimeter of a quadrangle;

Decision:

1) Find the 2nd side: 8 cm * 3 = 24 cm;

2) Find the 3rd side: 24 cm – 7 cm = 17 cm;

3) Find the 4th side: 17 cm – 9 cm = 8 cm;

4) In order to find the perimeter of the quadrilateral, you need to add all 4 sides of the quadrilateral.

The perimeter of the quadrilateral is:

P = 8 cm + 24 cm + 17 cm + 8 cm = 16 cm + 24 cm + 17 cm = 40 cm + 17 cm = 57 cm;

Answer: P = 57 cm.