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21 May, 11:38

What is the greatest possible whole-number value of the congruent side lengths?

9 cm

10 cm

14 cm

15 cm

+3
Answers (1)
  1. 21 May, 12:04
    0
    In an obtuse triangle, the square of the longest side is greater than the sum of squares of the other two sides. So the equal legs must have a length

    L^2 + l^2=2l^2

    14^2+14^2=20^

    196+196=400

    392=400

    14cm is the greatest
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