Find angle GHF. Round to 3 sf. Do not use units.

(a)  

Find the area of triangle ABC. Round to 3 sf. Do not use units.

(a)  

Find the length of side AC. Give your answer correct to 3 significant figures without units.

(a)  

Find the length of side AC. Give your answer correct to 3 significant figures without units.

(a)  

Find the measure of angle A. Give your answer correct to 3 significant figures, without units.

(a)  

From the top of a lighthouse, the angles below the horizontal to two ships P and Q are 30° and 40° respectively. The ships and the lighthouse are on a straight line. The distance between the ships is 100 m. Find the height of the lighthouse to the nearest metre. You do not need to give the units with your answer.

(a)