Data

Copy and paste the text below. It is read-only. Select All

congruent figures with same size and shape corresponding parts a pair of sides or angles in the same position on similar figures reflectional symmetry when a figure can be folded on a given line that divides it into two congruent parts reflection a flip across a given line rotation a turn around a given point with a given angle and direction rotational symmetry when a figure can be turned around a central point less than 360 degrees and it matches up with the original image transformation a change in the size or position of a figure translation movement of a figure along a straight line similar figures have the same shape but are not the same size scale factor a ratio used to enlarge or reduce similar figures dilation a transformation that changes the size of an image but not the shape. ratio a comparison of two numbers by division proportion an equation that states that two ratios are equal rate a ratio of two quantities with different units enlargement an increase in size of all dimensions in the same proportions and have a scale factor > 1 reduction a decrease in size of all dimensions in the same proportion and have a scale factor < 1 unit rate a rate simplified so the denominator is 1 (mpg, cost/item) cross products used to solve proportions or compare two ratios indirect measurement uses similar figures and proportions to find a missing measurement scale the ratio of a distance in a drawing to the actual distance