Material Taken From: Mathematics for the international student Mathematical Studies SL Mal Coad, Glen Whiffen, John Owen, Robert Haese, Sandra Haese and Mark Bruce Haese and Haese Publications, 2004 AND Mathematical Studies Standard Level Peter Blythe, Jim Fensom, Jane Forrest and Paula Waldman de Tokman Oxford University Press, 2012

Area of a Triangle If we know the base and the height of a triangle, we can find the area using A = ½ bh

What if we don’t know the height? Area of a Triangle

Area = ½ ab sinC = ½ bc sinA = ½ ac sinB A C B a b c Area of a Triangle

Find the area of triangle ABC Practice 38.7 cm 2

The diagram shows a triangular children’s playground. Find the area of the playground. Practice 381 m 2

If the area of a triangle is 1782 m 2. Find the included angle if the two side lengths measure 103 m and 58 m. Practice 36.6