Ratios and Proportions
Similar
Polygons
Polygons
Similarity by AA, SSS, & SAS
Proportionality
Three Parallel Lines
100
What is the method used to solve a proportion? (Two words)
Cross multiplication
100
True or false: Similar figures do NOT have congruent angles.
False
100
If two angles in one triangle are congruent to two angles in another triangle, then the two triangles are similar.
AA Postulate
100
(BE)/(EC)=?/(FC)
DF
100
True or false: The three parallel lines theorem be applied to any number of parallel lines and transversals.
True
200
Simplify this ratio.
50:250
1:5
200
What is true about the shape and size of similar figures?
same shape, different size
200
If two sides in one triangle are proportional to two sides in another triangle and the included angle in both are congruent, then the two triangles are similar.
SAS Similarity Theorem
200
(EC)/(CB)=(FC)/?
CD
200
a=12
300
Figure A has a side length of 12. Figure B has a side length of 8. What is the scale factor from A to B?
2/3
300
Suppose △ABC ~ △JKL. What angle is congruent to ∠K?
∠B
300
If the corresponding sides of two triangles are proportional, then the two triangles are similar.
SSS Similarity Theorem
300
(DB)/?=(BC)/(EC)
FE
300
b=30
400
4/5=x/30
x=24
400
Suppose △ABC ~ △JKL. What side is congruent to side JL?
side AC
400
These triangles are similar by ____.
SAS
400
The ratio of the sides of similar polygons is 2/3. What is the ratio of the areas?
4/9
400
What is x?
4760
500
x/10=42/35
x=12
500
What is the scale factor of △ABC to △XYZ?
3/4
500
These triangles are similar by ____.
AA
500
A photo is enlarged so that its area is 25 times bigger than the original. By what factor were the sides increased?
5
500
What is y?
3570