AnswersECASD - Geometry A - CRArea of Composite Figures

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Triangle STV was dilated with the origin as the center of dilation to form S'T'V'.

Question illustration
A
One-third
Option A
B
Two-thirds
Option B
C
Three-halves
Option C
D
Three
Option D
2
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Triangle MNP will be dilated according to the rule(x,y), where point P is the center of dilation.

Question illustration
A
(-2, 4)
B
(-2, 6)
C
(-4, 4)
D
(-4, 8)
3

On a coordinate plane, 2 polygons are shown. Polygon A B C D is larger than polygon A prime B prime C prime D prime and is reflected across the y-axis to form polygon A prime B prime C prime D prime.

Question illustration
A
a dilation with a scale factor less than 1 and then a reflection
B
a dilation with a scale factor less than 1 and then a translation
C
a dilation with a scale factor greater than 1 and then a reflection
D
a dilation with a scale factor greater than 1 and then a translation
4

Triangle MNP is dilated according to the rule DO,1.5 (x,y)(1.5x, 1.5y) to create the image triangle M'N'P, which is not shown.

Question illustration
A
M'(-6, 9) and N'(4, 9)
B
M'(-6, 9) and N'(3, 9)
C
M'(-2, 3) and N'(7, 9)
D
M'(-2, 3) and N'(1, 3)
5

Trapezoid DEFG is dilated according to the ruleDO,4(x,y) to form the image trapezoid D'E'F'G', which is shown on the graph.

Question illustration
A
(-2, 1)
B
(-4, 2)
C
(-12, 0)
D
(-32, 16)
6

On a coordinate plane, 2 polygons are shown. Polygon A B C D has points (negative 3, 3), (5, 3), (5, negative 1), and (1, negative 5). Polygon A prime B prime C prime D prime has points (negative 5, negative 2), (negative 3, negative 2), (negative 3, negative 3), and (negative 4, negative 4).

Question illustration
A
a dilation with a scale factor of and then a rotation
Option A
B
a dilation with a scale factor of and then a translation
Option B
C
a dilation with a scale factor of 4 and then a rotation
D
a dilation with a scale factor of 4 and then a translation
7

Which graph shows a dilation?

A
On a coordinate plane, 2 quadrilaterals are shown. The larger quadrilateral has points (negative 4, 3), (0, 3), (2, 0), and (negative 2, 0). The smaller quadrilateral has points (negative 2, 2), (0, 2), (0.5, 0), and (negative 1.5, 0).
Option A
B
On a coordinate plane, 2 quadrilaterals are shown. The larger quadrilateral has points (negative 4, 3), (0, 3), (2, 0), and (negative 2, 0). The smaller quadrilateral has points (negative 2, 2), (0, 2), (0.5, 0), and (negative 1.5, 0).
Option B
C
On a coordinate plane, 2 quadrilaterals are shown. The larger quadrilateral has points (negative 5, 3), (1, 3), (4, 0), (negative 2, 0). The smaller quadrilateral has points (negative 1, 0), (negative 2, 1), (0, 1), and (1, 0).
Option C
D
On a coordinate plane, 2 quadrilaterals are shown. The larger quadrilateral has points (negative 5, 3), (1, 3), (4, 0), (negative 2, 0). The smaller quadrilateral has points (negative 0.5, 0), (negative 1, 2), (1, 2), (1.5, 0).
Option D
8

Which statements are true about the parallelograms? Select three options.

A
The length of side MN is 2 units.
B
The length of side M'N' is 5 units.
C
The image is smaller than the pre-image.
D
Sides MQ and M'Q' both have the same slope, 1.
E
The scale factor is .
Option E
9

On a coordinate plane, 2 quadrilaterals are shown. Quadrilateral A B C D has points (2, negative 2), (4, negative 2), (3, negative 4), and (1, negative 4). Quadrilateral J K L M has points (4, negative 4), (8, negative 4), (6, negative 9), and (2, negative 9).

Question illustration
A
Yes, because sides JK and ML are twice as long as sides AB and DC.
B
Yes, because both figures are parallelograms, so corresponding sides are parallel.
C
No, because sides JK and ML are not twice as long as sides AB and DC.
D
No, because sides JM and KL have different slopes from sides AD and BC.
10

Which graph shows a dilation?

A
On a coordinate plane, 2 rectangles are shown. The larger rectangle is 8 units wide and 4 units high. The smaller rectangle is 4 units wide and 2 units high.
Option A
B
On a coordinate plane, a square and a rectangle are shown. The square is 2 units wide and 2 units high. The rectangle is 8 units wide and 4 units high.
Option B
C
On a coordinate plane, 2 rectangles are shown. The larger rectangle is 7 units wide and 4 units high. The smaller rectangle is 3 units wide and 2 units high.
Option C
D
On a coordinate plane, 2 rectangles are shown. The larger rectangle is 7 units wide and 4 units high. The smaller rectangle is 3 units wide and 1 unit high.
Option D

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