Similar Triangles

1
Similar Triangles

• Geometry
• Ms. Hough
• 7-3

2
Angle Angle Similarity

• If two angles of one triangle are congruent to
  two angles of another triangle, then the two
  triangles are SIMILAR

3
Side Angle Side Similarity

• If two sides of two triangles of proportional,
  and the included angles are congruent, then the
  triangles are similar

75
ax
bx
75
a
b
4
Example 1

• Find AE and DE

C
A
x - 1
5
2
E
B
x 5
D
5
Example 2

• Determine whether the pair of triangles are
  similar. Justify your answer

40
20
120
120
6
Class Work

• Complete 7-3 SGI
• HOMEWORK
• Page 400, Problems 1-5