http://www.ck12.org Chapter 7. Similarity
7.5 Proportionality Relationships
Learning Objectives
- Identify proportional segments when two sides of a triangle are cut by a segment parallel to the third side.
- Extend triangle proportionality to parallel lines.
Review Queue
- Write a similarity statement for the two triangles in the diagram. Why are they similar?
- IfX A= 16 ,XY= 18 ,X B= 32 ,findX Z.
- IfY Z=27, findAB.
- FindAYandBZ.
- IsAXAY=BXBZ?
Know What?To the right is a street map of part of Washington DC.RStreet,QStreet, andOStreet are parallel and
7 thStreet is perpendicular to all three.RandQare one “city block” (usually^14 mile or 1320 feet) apart. The other
given measurements are on the map. What arexandy?
What is the distance from:
- Rand 7thtoRand Florida?
- Qand 7thtoQand Florida?
- Oand 7thtoOand Florida?