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Geometry - 4th Edition

Chapter 7: Right Triangles

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This site applies to the entire chapter.

http://www.freemathhelp.com/Lessons/PreAlgebra_Right_Triangles_BB.htm This site contains a video tutorial with notes on right triangles.

7.1  Squares and Square Roots

This page defines and explains squares and square roots.

7.2  The Pythagorean Theorem

This site explains the Pythagorean Theorem, explains examples, and contains animations to show triangle sides relating to each other.

This page contains the definition of the Pythagorean Theorem and an example.

7.3  Special Right Triangles

This site explains the special right triangles and gives examples.

NEW This page explains and provides practice problems for the 30-60-90 and 45-45-90 special right triangles.

7.4  The Tangent Ratio

http://www.teacherschoice.com.au/Maths_Library/Trigonometry/tangent_ratio.htm This page explains the tangent ratio with pictures.

7.5  Sine and Cosine Ratios

http://www.teacherschoice.com.au/Maths_Library/Trigonometry/sine_ratio_1.htm This page explains the sine ratio with pictures.

http://www.teacherschoice.com.au/Maths_Library/Trigonometry/cosine_ratio_1.htm This page explains the cosine ratio with pictures.

7.6  Law of Sines and Law of Cosines

http://www.freemathhelp.com/Lessons/Geometry_Law_of_Sines_BB.htm This site contains a video tutorial with notes on the law of sines.

This site explains the laws of sines, including the ambiguous case.

http://www.freemathhelp.com/Lessons/Geometry_Law_of_Cosines_BB.htm This site contains a video tutorial with notes on the law of cosines.

This page explains the laws of cosines.