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A comparison of two quantities by division. Give examples. Ratio E.G. 5:8; 5 to 8; 5/8
A ratio that compares quantities with different units. Examples. Rate E.G. MI/HR; FT/SEC or MI/GAL
Rate for one unit of a given quantity. Examples. Unit rate E.G. 55 MI/1 HOUR; 30 FT/ 1 SEC; 32 MI/ 1 GAL
An equation stating that two ratios are equal. Proportion
Can be found by multiplying the numerator of one ration by the denominator of the second ratio. In proportions, they are equal. Cross products E.G. 6/10 9/15 6 x 15 = 90; 9 x 10 = 90 Cross products are equal in proportions.
Same shape, not necessarily the same size. Similar figures
Equal measures of angles. Congruent angles
Corresponding angles that are congruent and corresponding sides for proportions. Similar polygons
To make a figure larger or smaller. Dilation
The ratio of one side of the original figure to the corresponding side of the dilated figure. Scale factor E.G. DILATED SIDE/ORIGINAL SIDE
A scale factor that is greater than one. Enlargement
A scale factor that is less than one. Reduction
A model that is similar to the actual model it presents. Scale model
The ratio of the length of the model to the actual corresponding length of the object. Scale
Uses proportions and similar triangles to measure distances that would be difficult to measure directly. Indirect measurement
Created by: nyxshadow