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Poole, Robert R. – Math Teacher, 1970
Reports a proof of a classical geometry problem. The proposition is - In any triangle there are two equal sides, if the angles opposite these sides have angle bisectors with equal lengths. (RP)
Descriptors: Geometry, Mathematics, Plane Geometry, Problem Solving
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Jennings, Donald E. – Math Teacher, 1970
Descriptors: Geometric Concepts, Mathematical Concepts, Mathematics, Problem Solving
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Mann, John E. – Math Teacher, 1970
The present problem was derived from the knowledge that if the midpoints of the sides of any quadrilateral are connected, a parallelogram would be obtained. The author explores what would happen if similar procedures were applied to pentagons, hexagons, and other geometric forms. (RP)
Descriptors: Geometric Concepts, Geometry, Instruction, Mathematical Concepts
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Allen, Merle C. – Math Teacher, 1970
Presents two equivalent forms of the Pythagorean theorem, and a form for finding the area of a right triangle. (RP)
Descriptors: Algebra, Geometric Concepts, Geometry, Mathematics
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Cheney, Fitch – Math Teacher, 1970
Presented are some of the special properties possessed by a triangle in which the measure of one of its three angles is one-half the measure of another of these angles. The author names such a triangle a vux triangle. (RP)
Descriptors: Geometric Concepts, Mathematical Concepts, Mathematics, Problem Solving