Using only elementary geometry, determine angle x. Provide a step-by-step proof.
You may only use elementary geometry, such as the fact that the angles of a triangle add up to 180 degrees and the basic congruent triangle rules (side-angle-side, etc.). You may not use more advanced trigonomery, such as the law of sines, the law of cosines, etc. There is a review of elementary geometry below.
Multimedia learning units on mathematical subjects for secondary school, highschool, college, and university
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Beyond instant numerical calculations, this nifty AJAX tool provides a quick interface for various types of synchronous feedback.
Telling women they can't do well in math may turn out be a self-fulfilling statement. In tests in Canada, women who were told that men and women do math equally well did much better than those who were told there is a genetic difference in math ability.
(Just in case you don't already know.) A number cubed is that number times itself times itself. For example, 4 cubed, normally written 43, is 4 × 4 × 4 = 64. The cube root goes in the opposite direction, so the cube root of 64 is 4.
To give a larger example, 657 cubed = 657^3 = 657 × 657 × 657 = 283593393, so the cube root of 283593393 is 657.
Math Manipulatives, part of the Math Web Resources and Standardized Test Preparation series, contains resources that enable students to interact online.
Math Fun Facts are ideas and fun facts that will change the way you think.
This archive is designed as a resource for enriching your math courses and nurturing your interest and talent in mathematics!
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Using only elementary geometry, determine angle x. Provide a step-by-step proof. You may only use elementary geometry, such as the fact that the angles of a triangle add up to 180 degrees and the basic congruent triangle rules (side-angle-side, etc.). You may not use more advanced trigonomery, such as the law of sines, the law of cosines, etc. There is a review of elementary geometry below.
Multimedia learning units on mathematical subjects for secondary school, highschool, college, and university
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