April 09, 2013
April 09, 2013
7.5 Using Proportional Relationships
Indirect measurement: any method that uses
formulas, similar figures, and/or proportions to
measure an object.
April 09, 2013
1. Tyler wants to find the height of a telephone pole. He
measured the pole's shadow and his own shadow and then
made a diagram. What is the height of the pole?
h
5ft 9in
7ft 8in
38ft 4in
April 09, 2013
2. On a Wisconsin road map, Kristin measured a distance
of 11.125 in from Madison to Wausau. The scale of this
map is 1 in : 13 miles. What is the actual distance
between Madison and Wausau to the nearest mile?
April 09, 2013
3. Lady Liberty holds a tablet in her left hand. The
tablet is 7.19m long and 4.4m wide. If you made a
scale drawing using the scale 1cm:0.75m, what would
be the dimenstions to the nearest tenth?
April 09, 2013
4. Given that LMN
area A of QRS.
QRS, find the perimeter P and
M
R
13cm
9.1cm
L
P=36cm
A=60cm2
N
Q
S