Question

Will Medal and FAN
Table : ( https://postimg.org/image/dzyjre7zh/ )
The table shows the proof of the relationship between the slopes of two perpendicular lines. What is the missing statement in step 2?
https://postimg.org/image/8dv81qhk7/

Answer 1

Looking at the statements immediately before and after the missing ones, you can see that you have similar triangles given and that proportions will be involved.

Lengths of corresponding sides of similar triangles are in proportion.

Pay attention to the order of the letters in the line-up of the triangles.

Tri ABC ~
Tri CED

A<-->C
B<-->E
C<-->D

Looking at satement 3, you know that sides AB, EC, BC, and ED are involved on statement 2.

Arrange the endpoints of the segment lengths so that they are in alignment with the vertices in the triangle similarity statement.

AB BC
---- = -----
EC ED

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