Unit 3 Vocabulary

Front

Proportional Relationship

Back

is a relationship where the values for one quantity are multiplied by the same number to get the values for the other quantity

Front

Diameter

Back

a straight line passing from side to side through the center of a circle

Front

Scale Copy

Back

is a copy of a figure when where every length in the original figure is multiplied by the same number

Front

Corresponding Parts

Back

when part of an original figure matches up with part of a copy (these could be points, segments, angles, or distances)

Front

Area of a Circle

Back

the region inside of a circle; we can use

π x r² to solve for it

Front

Constant of Proportionality

Back

the number that is multiplied for quantity to get the value for the other quantity; we can see this number on a graph at (1,k)

Front

Circumference

Back

perimeter of a circle; we can use 2πr or πd

Front

Equivalent Ratios

Back

two ratios are equivalent if you can multiply each of the numbers in the first ratio by the same factor to get the number in the second ratio

Front

Scale Factor

Back

to create a scaled copy, we multiply all the lengths in the original figure by the same number

Front

Scale Drawing

Back

is a drawing that represents an actual place or object