Year 9 Interactive Maths - Second Edition

Problem Solving Unit

Problem 15.1  Coins

Problem 15.2  Inscribed Triangle

A triangle is inscribed in a circle such that one side of the triangle is a diameter of the circle.  If one of the acute angles of the triangle has measure 40º and the side adjacent to that angle has length 9 cm, find the radius of the circle.

Study Another Topic in Chapter 15: Trigonometry

[ Naming the Sides of a Right-Angled Triangle ] [ Finding Side-Lengths ] [ Using the Cosine Ratio ] [ Using the Tangent Ratio ] [ Using a Graphics Calculator ] [ Finding Angles ] [ Using Inverse Cosine ] [ Using Inverse Tangent ] [ Problem Solving ] [ Problem Solving Unit ] [ Projects ] [ Symbols ] [ Index ]