Applet: The Sine Law

Instructions*    Calculated Values*    Text Reference*   Using the Applet

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Instructions:

1) Drag the triangle vertices to the desired configuration.

2) Watch how the angles, sides, and ratios change as the vertices are moved.

3) If you want to start over, use the Refresh button on your browser.

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    • Calculated Values:

    1) Measures of lengths of sides.

    2) Measures of angles in degrees.

    3) Ratios of sines of angles to lengths of opposite sides.

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    • Text Reference:

    McGraw-Hill Ryerson Mathematics: Preparing for College & Apprenticeship, Section 1.4, Page 21.

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    • Using the Applets:

    1) Use the applet to demonstrate that the ratios remain the same despite changes in side lengths and angles.

    2) Extend the demonstration to an obtuse-angled triangle.

    3) Use the applet to check solutions to trigonometric problems by finding the answers empirically.

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    • This page uses JavaSketchpad, a World-Wide-Web component of The Geometer's Sketchpad. Copyright © 1990-2001 by KCP Technologies, Inc. Licensed only for non-commercial use.