Apps, Geometry, Isosceles

Isosceles Tutorial: Finding the Orthocenter

The orthocenter of a triangle is the intersection of the altitudes of the triangle. In this tutorial, you’ll learn how to construct this orthocenter.

1. To start the triangle, first create a point by tapping the canvas.

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2. Choose the Line Tool and drag from the point to create a line.

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3. Repeat this process to finish the triangle.

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4. We need to link this shape so it registers as a triangle. Tap and hold in a blank area, then drag in a circle to select the triangle. Tap one of the figures to show the menu, then tap Link.

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5. To construct the altitudes, tap and hold on one of the points, then tap Info in the menu. You should see a menu like this:

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6. Tap the altitude item to construct the altitude.

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7. Repeat these steps to construct altitudes for the other points. If you have Shows Intersections turned on in the Canvas Settings, you should see the orthocenter already.

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8. Tap the intersection with the default pencil selected to create the orthocenter. You can now move the vertices of the triangle, and the orthocenter will update in real time.

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Please leave a comment if you have any questions!

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