A park ABCD is on level ground. In triangle ABD, AB = 160 m, AD = 120 m and \angle BAD = 110^\circ. Find the length of the path BD, correct to the nearest metre.

EM-3051

Cosine rule

E Math · Secondary 4 · Medium · Cosine rule

A park ABCD is on level ground. In triangle ABD,

AB = 160

AD = 120

m and

\angle BAD = 110^\circ

.

Find the length of the path BD, correct to the nearest metre.

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