Shape and Space 3
3 marks · NormalAt a certain time of day, the shadow of a vertical post measures 4.2 m. The angle of elevation of the Sun is 68°.
Calculate the height of the post. Give your answer correct to 2 decimal places.
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10.43 m (±0.04)
Common mistakes: Using the shadow as the hypotenuse; Using sine/cosine
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Marking points
M1 · 1 mark · Identifies correct formula: h = 4.2 × tan(68°)
A1 · 1 mark · Accurate calculation using calculator
A2 · 1 mark · Final answer correct to 2 d.p.: 10.43 m
Worked solution