Pearson Geometry Common Core, 2011
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Pearson Geometry Common Core, 2011 View details
6. Inequalities in One Triangle
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Exercise 23 Page 329

No, see solution.

Practice makes perfect
We have been given the following potential side lengths. 8 m 10 m 19 m

We will check whether these sides can form a triangle. In order to do that, we will use the Triangle Inequality Theorem. This theorem tells us that the sum of the lengths of any two sides of a triangle is greater than the length of the third side.

Applying this theorem to the given side lengths, we have three inequalities. I:& 8+10? > 19 ⇒ 18 ≯ 19 II:& 10+ 19? > 8 ⇒ 29 > 8 III:& 19+ 8? >10 ⇒ 27 > 10 Since Inequality I is not true, a triangle cannot have these sides.