Enlargements and Area
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Lesson details
Key learning points
- In this lesson, we will describe and draw enlargements, observing the effect on the area.
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8 Questions
Q1.
Fill in the gap: We can enlarge shapes using a ___________.
centre of enlargement
factorise
line of enlargement
multiply
Q2.
When you enlarge a shape by a scale factor which of the following will change?
None of the above
The 'form' of the shape (if it was a square it night not be a square anymore)
The angles
Q3.
Decide if the following is true or false: An enlarged shape will always be bigger.
True
Q4.
State the scale factor of enlargement for the transformation from A to B
1/4
1/8
8
Q5.
State the scale factor of enlargement for the transformation from B to A
1/8
4
8
Q6.
A is transformed to B. Which statement is correct?
None of the above
The perimeter of B is 1/4 times bigger than the perimeter of A.
The perimeter of B is 1/8 times bigger than the perimeter of A.
The perimeter of B is 8 times bigger than the perimeter of A.
Q7.
A shape has a perimeter of 14 cm. What will the perimeter be after an enlargement by scale factor 5?
140 cm
19 cm
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Q8.
A shape has a perimeter of 14 cm. What will the perimeter be after an enlargement by scale factor 0.5?
14.5 cm
28 cm
70 cm
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6 Questions
Q1.
Select all the words that would correctly fill the gap: When we _______ a shape we can affect the area.
reflect
rotate
translate
Q2.
Select the option that best fills the gap in order: The example below shows two different enlargements of the triangle on the left. If we enlarge by a ___________ of 2, the area becomes ____ times greater.
enlarger, 2
scale factor, 2
scale factor, 8
Q3.
I enlarge this small rectangle with scale factor 3. How many of the small rectangles would be needed to make the enlarged rectangle?
12
3
6
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Q4.
This shape is enlarged. What is the area of the enlarged shape if the scale factor is 5?
122 squares
40 squares
70 squares
Q5.
This shape is enlarged. What is the area of the enlarged shape is the scale factor is 1?
1344 cm²
672 cm²
84 cm²
Q6.
This shape is enlarged. What is the area of the enlarged shape is the scale factor is 4?
1344 cm²
42 cm²
84 cm²