workat it to writea proportionthat isnotequivalentto the proportionyou are given!
Pointsto Consider
As we moveaheadwe will meetimportantconceptsthat requirethe use of ratiosand proportions.Proportions
are mandatoryfor understandingthe geometricmeaningofsimilar. Laterwhenwe work with transformations
and scalefactors,ratioswill also be useful.
Finally, one proofof the PythagoreanTheoremrelieson proportions.
LessonExercises
Giventhat , ,. For eachof the following,write“true”if the proportionmust
be true. Otherwisewrite“false.”
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
- Prove:If , , , then.