11.1 Similar Figures
11.2 Proving Similar Right Triangles
11.3 Similarity Within Right Triangles
11.4 Proportional Partitions
11.5 Lengths, Perimeters, Areas, and Volumes
100
Solve the proportion:
4/(x-2)=(x+2)/35
x=+-12
100
If the triangles can be proved similar, name the postulate or theorem that justifies it. If not, explain why not.
Cannot be proved similar; no known congruent angles
100
Find the geometric mean of 5 and 25
5sqrt5
100
Determine if FG and DE are parallel. Explain why or why not.
No;
9/12 !=12/18
100
Find AB if
triangleABC~triangleGEF
x=8
200
Are the triangles similar? Why or why not?
No, the corresponding side lengths are not proportional.
200
If the triangles can be proved similar, write a triangle similarity statement and name the postulate or theorem that justifies it. If not, explain why not.
triangleGJK~triangleHJL; SAS~
200
Find the value of the variable.
8sqrt3
200
Find the value of x.
x=8
200
Find RT if
triangleMOP~triangleRAG
12.5
300
Find the length of MO for the similar triangles. 
MO=6
300
State whether the given lengths could be side lengths of similar triangles. If so, state a similarity ratio. If not, explain why not.
15, 24, 21 " and " 8, 5, 7
Yes,
k=3 " or " 1/3
300
Find the value of h and t
h=sqrt42
t=sqrt91
300
Find the value of x if
AB=36
x=20
300
Find DE if
triangleABC~triangleDEF, AB=12, " the perimeter of " triangleABD=144
" and the perimeter of " triangleDEF=16
4/3
400
Write a similarity statement for the pair of similar polygons; then write an extended proportion relating the lengths of their sides.
JKLM~QRSP; (JK)/(QR)=(KL)/(RS)=(LM)/(SP)=(MJ)/(PQ)
400
Name the postulate or theorem that shows the triangles are similar. Then find the value of the variable.
"AA"~; b=2.4 "yd"
400
Find the value of y
y=6
400
Find the value of x.
x=40
400
Find the ratio of the areas
9/16
500
If the polygons are similar, write a similarity statement and state the similarity ratio. If they are not similar, explain why. 
Not similar; the corresponding side lengths are not proportional
500
Find the height of a building if a vertical yardstick casts a 5 ft. shadow when the building casts a 170 ft shadow.
102 ft.
500
Carly steps back 8 ft from her house until she sees the top and bottom of the side of the house along the edges of a square piece of cardboard held in front of her. Estimate the height of Carly's house if her eye level is 4 ft above the ground.
20 ft.
500
Find the value of x. 
x=2
500
Find the ratio of the volumes of spheres with radii of
5pi " and " 8pi
125/512