Shape and Space 10
2 marks · NormalCalculate the area of a triangle with sides 7.2 cm and 5.1 cm, and included angle . Give your answer to 2 decimal places.
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11.65 cm² cm^2 (±0.05)
Also accept: 11.64 cm^2; 11.66 cm^2
Common mistakes: Not using sine function; Wrong formula
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Marking points
M1 · 1 mark · Uses correctly, with sides 7.2 and 5.1, angle 43°.
A1 · 1 mark · Evaluates area correctly to 2 decimal places. (follow-through)
Worked solution