The Impossible Triangle Which of these three triangles is impossible to draw? Explain.
You may use the Three Angles applet to test your thinking.
1. A triangle where one angle measures 20° and another angle
measures 45º. 115
2. A triangle where one angle measures 120° and another angle
measures 50°
3. A triangle where one angle measures 90° and another angle
measures 1000
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Summary