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McGraw Hill Integrated II, 2012

MH

McGraw Hill Integrated II, 2012 View details

2. Medians and Altitudes of Triangles

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Exercise 27 Page 423

Use the definition of an altitude.

Altitude

Practice makes perfect

Let's first recall that an altitude of a triangle is a segment from a vertex to the line containing the opposite side and perpendicular to the line containing that side.

From the diagram, we can see that LM connects the vertex L with the opposite side JK. Also, it is given that LM is perpendicular to JK. Thus, it fully satisfies the above definition. We conclude that LM is an altitude of △ JLK.

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Exercises p.421-425