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### 15 Cards in this Set

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• Back
 complementary angle Two Angles are Complementary if they add up to 90 degrees (a Right Angle). supplementary angle Two Angles are Supplementary if they add up to 180 degrees. diameter The distance across the center of a circle. straight angle a straight angle is 180 degrees median The middle number in a set of numbers. mode The number which appears most often in a set of numbers. radius The distance from the center to the edge of a circle equalateral triangle Equilateral Triangle Three equal sides Three equal angles, always 60° multiples The result of multiplying by a whole number. ratio A ratio shows the relative sizes of two or more values. acute angle An angle less than 90° (90° is called a Right Angle) factors Factors are the numbers you multiply together to get another number area The size of a surface.The amount of space inside the boundary of a flat (2-dimensional) object such as a triangle or circle. hexagon A 6-sided polygon pentagon A 5-sided polygon