Example 1

Solve the right triangle if Ð B = 22⁰ and b = 16 (see fig 8)

Ð C = 90⁰ , Ð B = 22⁰ \ Ð C = 90⁰ - 22⁰ = 68⁰

Example 2

In triangle PQR, p = 40, q = 9, Ð R = 90. Solve triangle PQR.

By Pythagoras theorem, r² = p² + q²

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Index

3. 1 Solving Right Triangles
3. 2 Law of Cosines
3. 3 Law of Sines
3. 4 The Ambiguous Case of Law of Sines
3. 5 Areas of Triangles
Supplementary Problems

Chapter 4