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JulsSmile [24]
3 years ago
12

In the diagram, KL = , LM = , and MN = . What is the perimeter of isosceles trapezoid KLMN?

Mathematics
2 answers:
LekaFEV [45]3 years ago
5 0
It's letter C
3sqrt2 + 2sqrt5
Elina [12.6K]3 years ago
4 0

Answer: 3) is the right option. The perimeter of given isosceles trapezoid is 3\sqrt{2}+2\sqrt{5} units


Step-by-step explanation:

In the given diagram a isosceles trapezoid KLMN is given with sides KL= 2√2 units , LM= √5 units and MN=√2units

To find the perimeter we need all the sides of the isosceles trapezoid i.e.we need to find KN with coordinates K=(-2,-4) and N=(-1,-2),by distance formula [distance between two points =\sqrt{(x_2-_1)^2+(y_2-y_1)^2}]

KN=\sqrt{(-1-(-2))^2+(-2-4)^2}\\= \sqrt{1^2+2^2}= \sqrt{1+4}= \sqrt{5}

OR as it is a isosceles trapezoid then two of its opposite sides must have have same length. as KL≠MN then LM must be equal to KN.

Now the perimeter of KLMN=KL+LM+MN+KN= 2\sqrt{2}+\sqrt{5}+ \sqrt{2}+ \sqrt{5}\\=3\sqrt{2}+2\sqrt{5}  units.

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