Geometry quiz proportions and dilation Flashcards
1
Q
Ratio
A
Comparison of 2 numbers a/b where b is not 0
2
Q
Proportion
A
Comparison of 2 equal ratios
3
Q
Cross product property
A
Cross multiplication. Multiply the means and extremes. Or if a/b = c/d then ad=bc
4
Q
Reciprocal property
A
If a/b=c/d then b/a=d/c
5
Q
Dilation
A
A transformation with a center and scale factor where the image is a similar reduction or enlargement of the preimage
6
Q
Geometric mean
A
The value that will work as both of the means in a proportion
7
Q
Sss theorem
A
3 sides have to be equal for the triangles to be proved similar
8
Q
Sas theorem
A
A side, angle, and side must be proved equal or proportionate in the triangles for them to be proved similar
9
Q
Aaa therem
A
If 3 sides = or prop. In each triangle, then triangles =similar
