Question

which are the possible sides of a triangle ? a. 15, 9, 3 b. 6, 12, 19 c. 11, 6, 3 d. 4, 8, 10

Answer 1

Answer:

Option d. 4, 8, 10

Step-by-step explanation:

we know that

The Triangle Inequality Theorem states that the sum of any 2 sides of a triangle must be greater than the measure of the third side

Verify each case

case a) we have

15, 9, 3

Applying the triangle Inequality Theorem

1) 15+9 > 3

24> 3 ------> is true

2) 15+3 > 9

18 > 9 ----> is true

3) 9+3 > 15

12 > 15  ----> is not true

therefore

The set of lengths cannot be used to form the sides of a triangle

case b) we have

6,12,19

Applying the triangle Inequality Theorem

1) 6+12 > 19

18> 19 ------> is not true

therefore

The set of lengths cannot be used to form the sides of a triangle

case c) we have

11,6,3

Applying the triangle Inequality Theorem

1) 11+6 > 3

17> 3 ------> is true

2) 11+3 > 6

14 > 6 ----> is true

3) 6+3 > 11

9 > 11  ----> is not true

therefore

The set of lengths cannot be used to form the sides of a triangle

case d) we have

4,8,10

Applying the triangle Inequality Theorem

1) 4+8 > 10

12> 10 ------> is true

2) 4+10 > 8

14 > 8 ----> is true

3) 8+10 > 4

18 > 4  ----> is true

therefore

The set of lengths can be used to form the sides of a triangle