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The ideas in this geometry lesson are taken from the Geometry ebook that I sell at MathMammoth.com. This lesson plan does not contain all the problems the Geometry ebook does. Altitude of a triangle
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| The altitude of a triangle is a line
segment from one vertex of a triangle
to the opposite side so that the line
segment is PERPENDICULAR to the side.
Look at the pictures. In other words, (1) it starts at a vertex and (2) is perpendicular to the side. Note how the altitude of an obtuse triangle can fall outside of the triangle. |
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| You can draw the altitude from ANY vertex of the triangle. | In fact, to
every triangle you can draw three different altitudes. Note in the last picture how amazingly they all three intersect in the same point! |
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1. Draw one altitude to each of the triangles. You can choose which vertex you want to draw it from.
[Pictures available in the ebook]
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