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ResourceSpotlight
In this activity, students will discover the side-splitter theorem and answer several questions about the side-splitter theorem. As an extension, students will discover the corollary to the side-splitter theorem and answer several questions.
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Texas Instruments, Inc.
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ResourceSpotlight
Students construct medians, altitudes, angle bisectors, and perpendicular bisectors of triangles. They then drag the vertices to see where the intersections of the segments lie in relation to the triangle, and they measure distances to identify relationships. They see that the intersection of the angle bisectors (in center) and that of the perpendicular bisectors (circumcenter) can be used, respectively, to draw a circle inscribed in and circumscribed about a triangle.
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Texas Instruments, Inc.
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ResourceSpotlight
In this activity, students will discover the side-splitter theorem and answer several questions about the side-splitter theorem. As an extension, students will discover the corollary to the side-splitter theorem and answer several questions.
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Texas Instruments, Inc.
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Demonstrates Pythagorean Theorem using interactive exercises and examples.
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Principles and Standards for School Mathematics
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A helpful scientific calculator that runs in your web browser window.
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Holt Online Learning
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This tutorial works with all the special relationships in right triangles, including the pythagorean theorem, geometric means, and special right triangles.
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Think Quest
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Gives summaries of the different centers of a triangle: centroid, incenter, circumcenter, and the orthocenter.
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Jim Loy's Mathematics Page
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This interactive page shows the positions of a triangle's median, altitude, angle bisector and perpendicular bisector with respect to the positions of the triangle's vertices.
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Universtiy of Washington - Math Department
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Interactive site on the attributes of triangles
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Math Warehouse
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