# 8.3b

## Quiz by Mark Bewley

Mathematics
Texas Essential Knowledge and Skills (TEKS)

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10 questions
• Q1
When a shape on a coordinate plane is dilated by a scale factor of 2, what is true about the attributes of the shape and its dilation?
The shape becomes a different shape.
Both angles and lengths become halved.
All lengths are doubled, and angles remain the same.
All angles are doubled, and lengths remain the same.
30s
8.3.B: Proportionality
• Q2
A triangle is dilated by a scale factor of 3 on a coordinate plane. How does this affect the perimeter of the original triangle?
The perimeter is multiplied by 9.
The perimeter is tripled.
The perimeter remains the same.
The perimeter is halved.
30s
8.3.B: Proportionality
• Q3
If a square on a coordinate plane has its vertices at (1,1), (1,3), (3,3), and (3,1) and is dilated by a scale factor of 0.5 about the origin, where will the vertex originally at (3,3) be located after dilation?
(6,6)
(1.5,1.5)
(0.5,0.5)
(2,2)
30s
8.3.B: Proportionality
• Q4
When a rectangle on a coordinate plane is dilated with a scale factor of 4 from a center of dilation at the origin, how does this affect the rectangle's area compared to the original?
The area remains the same.
The area is multiplied by 16.
The area is doubled.
The area is multiplied by 4.
30s
8.3.B: Proportionality
• Q5
If a circle on a coordinate plane has a radius of 5 units and is dilated by a scale factor of 3, what will be the length of the radius of the dilated circle?
8 units
10 units
15 units
5 units
30s
8.3.B: Proportionality
• Q6
A line segment on a coordinate plane is dilated by a scale factor of 4 from a point not on the line segment. How does the scale factor affect the line segment's slope?
The slope is halved.
The slope remains unchanged.
The slope becomes zero.
30s
8.3.B: Proportionality
• Q7
When a hexagon on a coordinate plane is dilated by a scale factor of 0.25, what happens to the distance between parallel sides of the original hexagon?
The distance is reduced to one-fourth of the original distance.
The distance remains the same.
The distance is doubled.
30s
8.3.B: Proportionality
• Q8
If a parallelogram on a coordinate plane has an area of 20 square units and undergoes dilation with a scale factor of 3, what is the area of the dilated parallelogram?
40 square units
120 square units
180 square units
60 square units
30s
8.3.B: Proportionality
• Q9
A square on a coordinate plane has a side length of 8 units. If the square is dilated by a scale factor of 0.5, what is the length of each side of the dilated square?
2 units
4 units
16 units
8 units
30s
8.3.B: Proportionality
• Q10
On a coordinate plane, a triangle with vertices at (2,3), (4,7), and (6,3) is dilated by a scale factor of 2, with the center of dilation at the origin (0,0). What are the coordinates of the dilated triangle's vertex that was originally at (4,7)?
(4,7)
(8,14)
(2,3.5)
(6,10)
30s
8.3.B: Proportionality

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