Given: Ray DR bisects angle CDA, angle 3 is congruent to angle 1, and angle 4 is congruent to angle 2 Prove: Angle 3 is congruent to angle 4
Tutor.com
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Triangle proofs. Questions & Answer keys.
West irondequoit Centeral School District
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Given: AC=DC and BC= CE Prove:Tri ABC= TRi DEC
Tutor.com
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A helpful scientific calculator that runs in your web browser window.
Holt Online Learning
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In-depth review of how to write a proof, with examples and definitions along the way.
Proofs
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Interactive quiz on properties
Math Warehouse
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This provides 4 to 5 congruent triangle proofs for more complex situations.
Analyze Math
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This site outlines the theorems about parallelograms with proofs to these theorems.
Steve Wilson of Sonoma State University
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Very comprehensive site concerning mathematical proofs. Contains excellent examples and interactive exercises.
Cut The Knot
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I need help with problems on right triangles. [ File > http://www.tutor.com/SharedSessionFiles/9e83283f-0640-454c-b7b3-807eedd23958_Right_Triangle_Homework.jpeg ]
Tutor.com
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