Answers for EoY Worksheet 10
1.
2.
3.
a)
5.6 cm
b)
7230 m
c)
4.18 m
d)
19 000 mm
e)
0.263 km
a)
𝐴 = 13 × 10 = 130 cm2
b)
𝐴 = 4 × 9 + 12 × 22 = 300 cm2
c)
𝐴=
d)
𝐴 = 5 × 18 +
a)
𝐶 = 𝜋 × 12 = 37.7 cm
𝐴 = 𝜋 × 62 = 113 cm2
b)
𝐶 = 𝜋 × 9.4 = 29.5 cm
𝐴 = 𝜋 × 4.72 = 69.4 cm2
c)
𝐶 = 𝜋 × 14 = 44.0 cm
𝐴 = 𝜋 × 72 = 154 cm2
d)
𝐶 = 𝜋 × 23 = 72.3 cm
𝐴 = 𝜋 × 11.52 = 415 cm2
(6+11)×9
2
= 76.5 cm2
18×7
2
= 153 cm2
4.
𝑑=
𝐶
𝜋
=
26
𝜋
5.
𝑑=
𝐶
𝜋
=
140
𝜋
= 44.6 cm
𝑟 = 22.3 cm
6.
𝑑=𝜋=
190
𝜋
= 60.5 cm
𝑟 = 30.25 cm
𝐶
= 8.3 cm