Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
how to express a ratio |
a to b a:b a/b (b cant be 0 for this) |
|
|
how to express a proportion |
proportion is a statement that two ratios are equal. you can write it like this a c - = - OR a:b = c:d b d |
|
|
extremes & means of a proportion |
a:b = c:d a and d are extremes ||| b and c are means the product of means is equal to the product of extremes (ad=bc) |
|
|
SIMILAR TRIANGLES |
similar triangles' angles & sides are proportional to the corresponding sides and angles of the other triangle. Can be proven with (AA, SSS, SAS) |
|
|
AA similarity (similar triangles) |
two angles in one triangle are congruent to two angles in another triangle. |
|
|
SSS similarity (similar triangles) |
measures of corresponding sides of triangles are proportional |
|
|
SAS similarity(similar triangles) |
measure of two sides of a triangle are proportional to the measures of the corresponding sides of the other triangle and the included angles are congruent. |
|
|
GEOMETRIC MEAN |
the geometric mean of two positive numbers a and b is a number x a x - = - square root of a times b x b |
|
|
MORE GEOMETRIC MEAN |
both hypotenuses can be used as the geometric mean |
|
|
MORE GEOMETRIC MEAN |
the altitude can also be used as the geometric mean |
