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Triangles

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Question
Answer
scalene triangle   a triangle with no equal sides  
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isosceles triangle   a triangle with two equal sides  
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equilateral triangle   a triangle with three equal sides  
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angle   two rays with a common endpoint (the vertex)  
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acute   an angle that measures less than 90 degrees  
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obtuse   an angle that measures greater than 90 degrees but less than 180 degrees  
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right   an angle (formed by perpendicular lines) that measures exactly 90 degrees  
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congruent   of equal measure, having exactly the same size and same shape  
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