IB skill practice

Use sine rule and cosine rule

Choose and apply the sine rule, cosine rule, and triangle area formulae with clear formula reasoning.

Paper 1, Paper 2 5 marks Difficulty 5

Triangle area with included angle

A triangle has sides \(10\) and \(14\) enclosing angle \(60^\circ\). Find the area to two decimal places.

Worked practice: result and interpretation

Calculate the requested result first, then choose the interpretation that follows from it.