Show:
Dilation and similarity
Multiple Choice
Vocabulary
Practice
Dilations
100
What is the scale factor of the dilation ( with a center at the orgin) if point L (8,4) becomes L' ( 24,12) ?
3
100
Which of the following describes the image of a figure after a dilation that has a scale factor between zero and one? A) It has a different shape from the original figure and is smaller than the original figure. B) It has the same shape as the original and is larger than the original figure. C) It has the same shape as the original and is smaller than the original figure D) It has the same shape and the same size as the original figure.
C) It has the same shape as the original and is smaller than the original figure.
100
What is the definition of supplementary angles?
the sum of two angles is 180'
100
Find the actual dimension The image of a worm is 4 times its actual size and has a length of 7 cm.
28 cm
100
A dilation is _______ to the original figure.
Similar
200
What is the scale factor of the dilation ( with a center at the origin) if point P (4,3) becomes P' (8,6)?
2
200
What are lines that are on the same plane?
Coplanar lines
200
Find the actual dimension The image of hair is 10 times its actual size and has a length of 0.4 cm.
4 cm
200
Dilations are centered around the ______,unless otherwise stated.
origin
300
Under a dilation of scale factor 4 with the center at the origin, if B (4,5), what will be the coordinates of the point B'?
(16,20)
300
Which of the following describes the image of a triangle after a dilation that has a scale factor of 5/6? A) Each angle has 5/6 of the measure of its corresponding angle in the original triangle. B) Each angle has 6/5 of the measure of its corresponding angle in the original triangle. C) Each angle has the same measure as its corresponding angle in the original triangle. D) Each angle is 1//6 larger than the measure of its corresponding angle in the original triangle.
C) Each angle has the same measure as its corresponding angle in the original triangle.
300
What's the definition of Congruent angles?
two angles that have the same measure.
300
A dilation maps triangleQRS to triangleQ'R'S' QR=10 in. and Q'R'= 12in. If RS =12in., what is R'S'?
10//12=12/x 14.4in
300
If the scale factor is greater than 1, the figure becomes _______.
Larger
400
Under a dilation of scale factor 7 with the center at the origin, if B (2,3), what will be the coordinates of the point B?
(14,21)
400
An angle measuring 42' is a(n)_______ angle. A) Right B)straight C)acute D)obtuse
C) acute
400
What is an Angle Bisector?
Cut an angle into two equal pieces
400
The image of a bug is 5 times its actual size and has a width of 1.5 cm. image length = scale factor x actual length-> ?=?x?
7.5
400
If the scale factor is between 0 and 1, the figure becomes _______.
smaller
500
Under a dilation of scale factor 3 with the center at the origin, if C (6,9), what will be the coordinates of the point C'?
(18,27)
500
An angle measuring 180' is a(n) _______ angle. a) right b) straight c) acute d) obtuse
b) straight
500
Find the word that matches the definition . Lines That Are Not On The Same Plane
Skew Lines
500
What month comes after April.
May
500
If the scale factor is 3, how would you write the rule? (2,3) -> (_,_)
(6,9)