Post on 17-Jan-2016
Favorite Color.
1 2 3 4 5
0 0 000
1. Red
2. Blue
3. Green
4. Orange
5. Other
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10
.
a. b. c. d.
0 000
a.
b.
c.
d. .
.A
.B
.C
.D only true for positive real numbers.
always true.
never true.
only true for negative real numbers.
Consider the statement "When finding the sum of 3 real numbers,
the order in which they are added does not matter; adding the
numbers in any order will produce the same total." The statement is:
Response Grid
Countdown
15
Geometry
Section 8.3Similar Polygons
Vocab
and the lengths of corresponding sides are proportional.Two polygons such that their corresponding angles are
3
4
5 6
8
10
3
64
85
101
2
6
38
410
52
1or
The ratio of the lengths of two corresponding sides of two
similar polygons.
A
B
CD
E
F
ABC DEF Similar symbol
“small to big” “big to small”
Proportionality Statement
8
64
34
3
4
3
4
3
16
1220
15
12
9
FGHJ KLMN
The “scale factor” is4
3
(HW: 15-18)
.
a. b. c. d.
0 000
a.
b.
c.
d. .
.A
.B
.C
.D
CHECKPOINT
The triangles are not similar.
ABC DEF
ABC EFD
ABC DFE
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“big to small”
4 156x 39x
39
The “scale factor” is13
or 13: 2 or 13 to 22
KL
PQLM
QRMN
RS
NK
SP
The perimeters have the same “scale factor” as the corresponding sides
Corresponding angles are .Corresponding sides are proportional
9 12 15 3
6 8 10 2 PQR VTS
Scale factor
The ratio of the perimeters is3
or 3 : 2 or 3 to 22
Perimeter
(HW: 19,20,22-24,27,28)Example 3
“big to small”
=x2
96
6 18x 3x
(HW: 21,25,26,39-42)4
.
a. b. c. d.
0 000
a.
b.
c.
d. .
.A
.B
.C
.D
CHECKPOINT
6x
37.5x
10.7x
6.4x
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Team Scores1 Red
0.86 Blue
0.83 Orange
0.8 Green
0.67 Other
• End
Geometry
Section 8.3Similar Polygons
Vocab
3
4
5 6
8
10
or
A
B
CD
E
F
(HW: 15-18)
(HW: 19,20,22-24,27,28)Example 3
=
(HW: 21,25,26,39-42)4