Download AA Similarity

AA Similarity
WARM UP! You have until announcements end.
Get BUSY. These will become notes so do them in
your notebook.
3𝑥 + 2 2𝑥 + 2
=
34
24
2𝑥 20
=
10
𝑥
𝑥
1
=
5 𝑥+4
10
5
84
3
6
1.
3.
2.
4.
What did the THIRD ANGLE THEOREM state?
If you know 2 angles in a triangle it is easy to find the
measure of the third.
Therefore, if two pairs of angles in two triangles are
congruent, the third pair of angles are congruent.
Are these SIMILAR?
If at least two pairs of angles
are congruent then they are
Similar by AA∼
Work the 8.2 AA Similarity paper
You have 20 minutes to try problems and ask
questions. Stay seated and work with a friend.
To prove similarity by SSS. You set
up all the corresponding sides in a
ratio and compare them. If they are
all the same, you have SSS Similarity
Work the 8.3 SSS and SAS Similarity paper
Problems 3-6.
You have 10 minutes to try problems and ask
questions. Stay seated and work with a friend.
To prove similarity by SAS, find one
pair of congruent angles, then
compare the ratio of two pairs of
corresponding sides.
Remember: 1. AA∼ Two pairs of congruent angles, OR
2. SAS∼ One pair of congruent angles and
two pairs of proportional sides, OR
3. SSS∼ Three pairs of proportional sides.
(Look for shared angles and set up corresponding side
ratios)
Work the 8.3 SSS and SAS Similarity paper-Prob 13 - 16.
You have 10 minutes to try problems and ask questions. Stay
seated and work with a friend.
Turn your paper in when complete.