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The perimeter of an isosceles triangle is 36 centimeters and two sides of the triangle are in the ratio $2:7$.  What is the number of centimeters in the length of the longest side?

 Dec 17, 2021
 #1
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Since it asks for the longest SIDE , I will assume the sides are in ratio    2:2:7      and NOT   2:7:7 (because then it would have TWO long sides)

 

36/(2+2+7)   * 7 = 22.9 cm

 Dec 17, 2021
 #2
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2:7:7

 

2x + 7x +7x = 36

 

x = 2.25

 

The length of the longest side is 15.75

Guest Dec 18, 2021

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