Glven: ACICD and AABC ACED Prove: slope of AĆ x slope of DC = -1
Statements
Reasons
1. ACICD
AABC is similar to ACED
Given
2.
Property of similar triangles
3. slope of
AC
一 A8
Definition of slope
slope of CD
х
4. Slope of AC x slope of CD
Multiplying the slopes
5. slope of AC x slope of CD = E x De Substitution property of equality
6. slope of AĆ x slope of CD = -1
Simplifying the right side
The table shows the proof of the relationship between the slopes of two perpendicular lines. What is the missing statement in step 2?