Draw a triangle that is both a right triangle and an isosceles triangle. You can use either pencil and paper, or a draw program.
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Label the angles. What are the measurements of the angles that are not equal to 90 degrees?
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Describe the two sides opposite the angles that are not equal to 90 degrees.
Now draw an equilateral triangle. Label the measurements of the angles.
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Can an equilateral triangle ever be a right triangle too? Explain your answer.
Finally, draw a right triangle. Can this triangle ever have an obtuse angle?
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Explain your answer.