- Carlosplaceda markerat.
- Darrylplaceda markerdirectlyacrossfrom Carlosat.
- Bela walked feet backfrom the bankin a line with the markersat and and placeda marker
at.- Annawalked feet on a path perpendicularto and placeda markerat.
- Eva movedalongthe lowerbankuntil she was linedup with and , and placeda markerat.
, , and are on land,so they can be measuredeasily. was measuredto be feet.- Nametwo similartriangles.
- Explainhow you knowthat the trianglesin exercise8 are similar.
- Write a proportionin whichthe only unknownmeasureis.
- How wide is the river?
- Discusswhetheror not the trianglesusedto answerexercises8-11 are goodmodelsfor a river and its
banks.
Answers
- , or equivalent
- The triangleshavetwo pairs of congruentalternateinterioranglesand one pair of congruentverticalangles.
Theyare similarby AAA and AA. - Any proportionobtainedfrom
- , or , for example