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tia_tia [17]
3 years ago
10

Which of these lengths CANNOT represent the sides of a triangle? {28, 30, 58} {32, 34, 60} {13, 20, 27} {2, 4, 5}

Mathematics
1 answer:
Nady [450]3 years ago
6 0

Answer:

A.\  {28, 30, 58}

Step-by-step explanation:

Required

Which of the lengths do not form a triangle

To do this, we make use of triangle inequality theorem which states that.

a + b > c

b + c > a

a + c > b

Where a,\ b\ and\ c are the sides of the triangle.

So, we have:

A.\  {28, 30, 58}

28 + 30 > 58 --- False

58 + 30 > 28 --- True

28 + 58 > 30 --- True

B.\ {32, 34, 60}

32 + 34 > 60 -- True

32 + 60 > 34 -- True

34 + 60 > 32 -- True

C.\ {13, 20, 27}

13 + 20 > 27 -- True

13 + 27 > 20 -- True

20 + 27 > 13 --- True

D.\ {2, 4, 5}

2 + 4 > 5 --- True

2 + 5 > 4 -- True

5 + 4 > 2 --- True

From the computations above, only (A) cannot form a triangle

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Check the picture below.

\textit{internal division of a line segment using ratios} \\\\\\ A(1,-5)\qquad B(10,1)\qquad \qquad \stackrel{\textit{ratio from A to B}}{1:5} \\\\\\ \cfrac{A\underline{C}}{\underline{C} B} = \cfrac{1}{5}\implies \cfrac{A}{B} = \cfrac{1}{5}\implies 5A=1B\implies 5(1,-5)=1(10,1)

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