1.9 Apps of props comp.notebook - Amphitheater … Apps...1.9 Apps of props comp.notebook September...
-
Upload
phungthien -
Category
Documents
-
view
217 -
download
4
Transcript of 1.9 Apps of props comp.notebook - Amphitheater … Apps...1.9 Apps of props comp.notebook September...
1.9 Apps of props comp.notebook September 01, 2017
VOCABULARY
Similar –
Corresponding Sides –
Corresponding angles –
Ex. 1
ΔPQR ~ ΔTUV
Find the length of VU.
TRYABCDE ~ FGHJK
Find the length of FG.
1.9 Applications of Proportions
P
Q
R
14cm6cm
T U
V
4cm
A
ED
C
B10 in
14 inF
K
J H
G
3.5 in
1.9 Apps of props comp.notebook September 01, 2017
Ex. 2
A flagpole casts a shadow that is 75ft long at the same time a 6ft tall man casts a shadow that is 9ft long. Write and solve a proportion to find the height of the flagpole.
Ex. 3The radius of a circle with radius 8in is
multiplied by 1.75 to get a circle with radius14in.
(a) How is the ratio of the circumferences related to the ratio of the radii?
(b) How is the ratio of the areas related to the ratio of the radii?
Ex. 4Every dimension of a rectangular prism with
length 12cm, width 3cm and height 9cm is multiplied by a third to get a similar prism. (a) How is the ratio of the ratio of the volumes related to the ratio of the corresponding dimensions?
Applications of Proportions
1.9 Apps of props comp.notebook September 01, 2017
Closure
Whilst getting your slate, tell your neighbor what you have learned today.
1) What happens to a scale drawing when a scale of 1in:50ft is changed to 1in:20ft?
2) Find side length BC given that ΔABC ~ ΔMLK
A
BC
51cm K L
M
12cm
8cm