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21 August, 15:56

Which set of side will make a triangle

a. 1cm, 3cm, 1cm

b. 5cm, 2cm, 3cm

c. 10cm, 3cm, 4cm

d. 10cm, 5cm, 9cm

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Answers (1)
  1. 21 August, 16:23
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    d. 10cm, 5cm, 9cm

    Step-by-step explanation:

    In a triangle, the length of each side must be between the difference and the sum of the lengths of the other sides.

    a. 1 + 1 = 2; 2 < 3 Answer: no

    b. 2 + 3 = 5; 5 = 5 Answer: no

    c. 10 - 3 = 7; 7 > 4 Answer: no

    d. 10 + 5 > 9

    5 + 9 > 10

    10 + 9 > 5

    10 - 5 < 9

    10 - 9 < 5

    9 - 5 <10

    Answer: yes
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