Question

PLEASE HELP!!! Pleasee :C

Answer 1

The error was in step 3

Explanation:

The first two steps are correct, the property of addition of internal angles of a triangle that equal
`180^o` is properly used, Also the addition of supplemental angles to total
`180^o` is also properly used.

In step 3. there is an error. Notice how it should have been done:

`\angle m+\angle n +\angle o=180^o\\\angle o + \angle p = 180^o\\then:\\\angle m+\angle n +\angle o=180^o=\angle o+\angle p\\\angle m+\angle n +\angle o=\angle o+\angle p`