Download 35A

Obj: SWBAT prove triangles ~ (G.7/7.2)
WU: wks day 35: Review questions (1-16)
*hw/hw log/storybook: “Similar Triangles”
Copy into your SOL Binder (day 35)
Answer:
DBE and any other triangle choice
Copy into your SOL Binder (day 35)
Answer:
3rd answer
4th answer
Definition of congruence
Division property of equality
SAS Similarity
AA Similarity postulate:
Angles
If two _________
of one triangle are congruent to
Angles of another triangle, then the triangles
two _______
are similar.
SSS Similarity Thm:
Sides
If the measures of the corresponding _______
of
two triangles are proportional, then the triangles
are similar.

SAS Similarity Thm:
Sides
If the measures of two __________of
a triangle are
proportional to the measures of two
corresponding sides of another triangle and the
Congruent
included angles are _________,
then the two
triangles are similar.
1. To estimate the height of a tree, a Girl Scout sights the top
of the tree in a mirror that is 34.5 meters from the tree. The
mirror is on the ground and faces upward. The scout is 0.75
meters from the mirror, and the distance from her eyes to the
ground is about 1.75 meters. How tall is the tree?
2. Are the triangles similar? If so, justify.
Now, classify the first triangle according to
the angles.
3. Justify if the two triangles are similar. If so, find x.
4
9
2
x
4. Find: AE, DE & AD
Given : AB CD
A
C
8
3x + 4
E
4
x + 12
B
D
3
6