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17 Cards in this Set

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  • Back
ratio
a comparison of two quantities

a/b or a : b
proportion
an equation stating that two ratios that are equal
cross product
a ⋅ d and b ⋅ d in the proportion,
a/b = c/d.

Property: The proportion is true if and only if the cross products are equal.
means
c and c in the proportion, a/b = c/d
extremes
a and d in the proportion, a/b = c/d
similar polygons
scale factor
the ratio of the lengths of corresponding sides in similar polygons
midsegment
Angle-Angle (AA) Similarity Theorem
Side-Side-Side (SSS) Similarity Theorem
Side-Angle-Side (SAS) Similarity Theorem
Triangle Proportionality Theorem
Converse of the Triangle Proportionality Theorem
Triangle Midsegment Theorem
Proportional Perimeters Thoerem
If two triangles are similar, then the perimeters are proportional to the measures of corresponding sides.
proportional parts of similar triangles
If two triangles are similar, then:

1. the measures of the corresponding angle bisectors of the triangles
2. the measures of the corresponding altitudes
3. the measures of the corresponding medians
4. the perimeters are proportional

are proportional to the measures of the corresponding sides
angle bisector & the opposite side