5th Form Christmas Term Assignment #7

Using the appropriate formula, find the length of side c.

• 5.9 cm

• 4.6 cm

• 9.2 cm

• 4 cm

If the angle at L is 40°, determine the length of side KM.

• 160 km

• 90 km

• 78 km

• 156 km

Determine the size of the angle STR and hence, the length of the side ST.

• 95 m

• 210 m

• 181.8 m

• 190 m

Calculate the length of side RS

• 10.06 cm

• 9 cm

• 7.01 cm

• 6.01 cm

Determine the size of the angle QTS

• 44.02°

• 45.98°

• 91°

• 65.32°

If PQ = 220 km and QR = 360 km, determine the length of the side RP

• 401 km

• 304 km

• 149.445 km

• 299 km

Determine the length of the side EG

• 12.2 m

• 10 m

• 4 m

• 9.3 m

Find the size of the angle at B

• 81.1°

• 90°

• 76.4°

• 124.3°

The sine rule is used when:

• We are given the length of two sides and the size of an angle opposite to one of those sides.

• We are given the length of two sides and the size of an angle NOT opposite to one of those sides.

• We are given the length of all 3 sides of the triangle

• For finding sides and angles of a right angle triangle

The cosine rule is used when:

• We are given the length of all 3 sides of the triangle

• We are given the length of two sides and the size of an angle opposite to one of those sides

• We are given the size of two angles and the length of a side opposite to one of those angles

• Finding the length of sides and the size of angles in right angle triangles