What's the Scale?
Vocabulary
X =
Grab Bag
Ratios
100
The scale factor from triangle DEF to triangle D`E`F`is ...
What is 1.5 cm?
100
What is the definition of scale factor?
What is the factor by which every side length in an original figure is increased or decreased to create a scaled copy?
100
The value of the unknown side length x is ...
What is x = 2.5?
100
True/False
The corresponding angles of similar figures are always congruent (the same)
What is true?
100
What is the reduction of the ratio 4:2,
e.g. 1:?
1:0.5
200
Triangle ABC has sides measuring 5, 6, and 7 cm. Triangle DEF has sides measuring 10, 12, and 14 cm. What is the scale factor?
What is 2?
200
What happens when the scale factor is 1.
What is the size stays the same?
200
The value of the unknown side length x is ...
What is x = 7?
200
True or False, when I enlarge a shape, it gets bigger
TRUE
200
What is the reduction of the ratio 2:10,
e.g. 1:?
1:5
300
The scale factor from triangle NPW to triangle N`P`W`is ...
What is 1/4?
300
!DOUBLE JEOPARDY!
What are the 2 ways to tell if triangles are similar?
What is the matching angles or same scale factor applied to every side?
300
!DOUBLE JEOPARDY!
The value of the unknown side length ? is ...
What is ? = 20?
300
True/False
If my scale factor is 1, my shape gets smaller
What is false?
300
What is the Ratio?
1:0.666666
400
Rectangle ABCD is similar to rectangle FGHI. The perimeter of rectangle FGHI is 50% the perimeter of ABCD. What was the scale factor from ABCD to FGHI?
What is 1/2?
400
The definition of polygons.
What is a shape with 3 or more sides, closed figure, and 2D figure?
400
The value of the unknown side length ? is ...
What is ? = 20?
400
True/False
Multiplying by a scale factor less than 1 causes a shape to get bigger.
What is false?
400
!DOUBLE JEOPARDY!
What is the ratio used to reduce PNW?
1:4
500
ABC and DEF are similar. ABC has side lengths 3, 9, 10 and DEF has side lengths 12,36,40. What is my scale factor from ABC to DEF?
What is 4?
500
If a scale factor is bigger than one, does my new shape get bigger or smaller or stay the same?
What is bigger?
500
The value of the ?
What is ? = 14?
500
!DOUBLE JEOPARDY!
The value of x.
What is x = 65 degrees.
500
ABC and DEF are similar. ABC has side lengths 3, 9, 10 and DEF has side lengths 12,36,40. What is the ratio from ABC to DEF?
1:0.25