This worksheet is great for learners wishing to practise using the 0.5absinC formula for finding the area of a triangle. It is also available with the added clues to add extra scaffolding.

Section A provides some straightforward questions involving finding the area when two sides and the included angle are given and one question where a side is to be found given the area. Section B provides some quadrilaterals of an unknown area.

Section C and an extension then provide some worded problems.