One of the sides of the quadrangle is 512 cm, the second side is 3 times smaller than the first, and the third is 3 cm more than the second and 15 cm less than the fourth. Calculate the perimeter of the quadrilateral.
1) Determine the value of the length of the second side of the quadrangle.
Divide the first side by 3.
512/3 = 170 2/3 cm.
2) Find how many centimeters is the length of the third side.
We add another 3 cm to the length of the 2 sides.
170 2/3 + 3 = 173 2/3 cm.
3) Find the fourth side.
We subtract 15 cm from the length of the third side.
173 2/3 – 15 = 158 2/3 cm.
4) Find the perimeter of the quadrangle.
To do this, we summarize all the sides.
512 + 170 2/3 + 173 2/3 + 158 2/3 = 1015 cm.
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