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Daily Problem·Saturday, 1 July 2023Back to today

Compound shape — two triangles

GCSE · Mathematics · OCR · G23 — Area = ½ab sin C for area, sides or angles of a triangle

Question

[5 marks] A quadrilateral ABCD is split by diagonal AC. In triangle ABC: AB = 7 cm, BC = 9 cm, angle ABC = 110°. In triangle ACD: AC = 13.2 cm, CD = 8 cm, angle ACD = 35°. Calculate the total area of quadrilateral ABCD. Give your answer to 3 s.f.

5 marks · take your time before peeking.

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