Worksheet: Using the Cosine Rules

Worksheet: Using the Cosine Rules

To Find a length:

To Find an angle:

1. Calculate the size of angle B2. Calculate the length of line C

3. Calculate the size of length a4. Calculate the size of angle B

5. Calculate the size of length p6. Calculate the size of angle N

7. Calculate the size of angle V

8. Calculate the size of length g

5 m

8 m

7 m

B

300

9 cm

6cm

15 km

a

9 km

430

13 km

c

6km

15 km

B

6.3m

8.1 m

p

520

7 feet

10 feet

5 feet

N

130m

160m

80m

0.56 m

0.43 m

g

V

940

Diagrams are not drawn to scale