slides with transitions

1. Enlargement
By Ms. Yong Hui Ying

2. What is Enlargement?
Change the size of an object by
1. Scale factor
2. Centre of Enlargement

3. A
A’
B C
B’ C’
Question:
Enlarge the triangle using
scale factor of 2.
Step 1: State the
coordinates of each point
of the triangle.
A ( -4, -1)
B ( -4, -4)
C (-2, -4)
Step 2: Multiple the
coordinates of each point
of the triangle with the
scale factor to get a new
coordinates.
A’ ( -8, -2)
B’ ( -8, -8)
C’ ( -4, -8)

4. B’
C’
A’
B
C
A
D’
D
Question:
Enlarge the trapezoid
using scale factor of 2.
A ( 0, 3)
B ( 2, 5)
C ( 4, 4)
D ( 3, 1)
A’ ( 0, 6)
B’ ( 4,10)
C’ (8, 8)
D’ ( 6, 2)

5. A’
A
B’
C’
B C
Question:
Find the scale factor used
to enlarge triangle ABC.
Step 1: Choose one point
from the original shape
and the enlarged shape,
state the coordinates.
C ( 3, 1)
C’ ( 9 , 3)
Step 2: Make an
equation.
3x = 9
x = 3
Hence, scale factor = 3

6. D’
D
A C C’
B
B’
Question:
Find the scale factor used
to enlarge ABCD.
D ( 1, 2)
D’ ( 2, 4)
x = 2
Hence, scale factor = 2

7. Question:
On the grid, enlarge the
triangle with the scale
factor of 2 and center
(1,1). Label the new
triangle S.
Step 1: from the center,
recognize the movement
of one point, then repeat
it based on scale factor,
mark the point down.
Step 2: connect the dots.
S

8. Question:
On the grid, enlarge the
triangle with the scale
factor of 3 and center
(2,3). Label the new
triangle U.
U

9. A Note About Enlargement
1. There are no specific formulas!
2. A fractional scale factor leads to a
reduction in size. A negative scale
factor means you go the opposite
direction to draw your new shape.

10. THANK YOU 