1. shape
size
𝒂:𝒃
𝒂 𝟐 : 𝒃 𝟐

2. ___ : ___ 9 6 ___ : ___ 9 6 ___ : ___ 92 62 = ___ : ___ 81 36
___ = ___ 81 60
81x =
2160 36 x 81 81
x =
26.67
in2

3. ___ : ___ 12 18 ___ : ___ 9 6 ___ : ___ 12 18 ___ : ___ 9 6 122
182
= ___ : ___
144
324
___ : ___ 92 62
= ___ : ___ 81 36
144
___ = ___ x
324x =
12960
___ = ___ 81 60
324 90
81x =
2160
324
324 36 x 81 81
x = 40
cm2
x =
26.67
in2

4. A = 50 cm2 A = 98 cm2 ___ : ___ 50 98 𝟓𝟎 𝟗𝟖 _____ : _____ Scale factor
of areas:
___ : ___ 50 98
𝒂 𝟐 : 𝒃 𝟐
Scale factor
of perimeters: 𝟓𝟎 𝟗𝟖
_____ : _____
𝒂:𝒃

5. x2.5
A = 50 cm2 13
A = 98 cm2
x 2.52
x2.5
Scale factor
of areas:
___ : ___ 50 98
𝒂 𝟐 : 𝒃 𝟐
Scale factor
of perimeters: 𝟓𝟎 𝟗𝟖
_____ : _____ 13
x 2.5
x 2.5 =
81.25
bushels
𝒂:𝒃

6. x2.5
A = 50 cm2
A = 98 cm2 13 13 13
6.5
Scale factor
of areas:
___ : ___ 50 98
x2.5 13 13
6.5
𝒂 𝟐 : 𝒃 𝟐
Scale factor
of perimeters:
6.5
6.5 𝟓𝟎 𝟗𝟖
3.25
_____ : _____
= ____ bushels
81.25
𝒂:𝒃

7. A = 135 ft2 A = 1875 ft2 ____ : ____ 1875 135 𝟏𝟖𝟕𝟓 𝟏𝟑𝟓 _____ : _____
Scale factor
of areas:
____ : ____
1875
135
𝒂 𝟐 : 𝒃 𝟐
Scale factor
of perimeters:
𝟏𝟖𝟕𝟓
𝟏𝟑𝟓
_____ : _____
𝒂:𝒃

8. ____ = ____ 32 2.50 A = 135 ft2 52 x A = 1875 ft2 ____ = ____ 9 2.5025 x
Scale factor
of areas:
____ : ____
1875
135
𝒂 𝟐 : 𝒃 𝟐
9x =
62.50
Scale factor
of perimeters: 9 9
𝟏𝟖𝟕𝟓
𝟏𝟑𝟓
_____ : _____
x = $
69.44
𝒂:𝒃