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### 17 Cards in this Set

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 analog clock A clock that shows the time by the positions of the hour and minute hands. angle two rays with a common endpoint. the common endpoint is called the vertex of the angle. acute angle an angle that has a measure greater than 0º and less than 90º. obtuse angle an angle that has a measure greater than 90º and less than 180º. right angle An angle that has a measure of 90º. straight angle An angle that has a measure of 180º. apex In a pyramid or cone, the vertex opposite the base. arc Part of a circle from one piont on the circle to another. area the measure of the surface inside a closed boundary. the formula for the area of a rectangle is A=l x w where A represents area, l the length and w the width. fact any of the basic addition, subtraction, multiplication and division relationships. array A rectangular arrangement of objects in rows and columns. attribute A common feature ( size, shape, color, number of parts and so on) of a set of figures. average : mean A typical or middle value for a set of numbers. it is found by adding the numbers in the set and dividing the sum by the number of numbers. bar graph A graph in which horizontal or vertical bars represent data. axis Either of the two number lines used to form a coordinate grid. capacity: volume A measure of how much liquid a container can hold. chance The probability of and outcome in an uncertain event. for example: in a coin toss there is an equal chance of getting heads or tails.