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Right-Angled trigonometry Finding an angle Example Calculate the size of angle A in the triangle ABC C 14 m 7m B A Example Calculate the size of angle P in the triangle PQR P 24 m 19m R Q Example Calculate the size of angle A in the triangle ABC B 4 cm A 6 cm C Example Find the size of angle x in each of the following (i) 1.2 cm x 4.7 cm (ii) x 10 cm 3.7 cm (iii) 7 cm x 12 cm Example Calculate the size of angle PQR in the triangle below. P 8 cm P 8 cm 6 cm R Example The road from village A runs due West for 5 miles to a fort B. A television mast is due South of B and 4 miles from B. Find the distance and bearing of the mast from A.
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