Points and lie on the circumference of a circle of radius

MATHEMATICS · Multi-part · CBSE · Mathematics · Trigonometric Functions · Trigonometric Functions

Problem

Points AA and BB lie on the circumference of a circle of radius 14 cm14\,\text{cm}. The minor arc ABAB has length 11 cm11\,\text{cm}. Answer the following questions. (i) Determine the measure of ∠AOB\angle AOB in radians and in degrees, correct to one decimal place. (ii) Calculate the length of the chord ABAB. (iii) The chord ABAB is used as the radius of a new circle. Find the area of this new circle in square centimetres, correct to one decimal place. (iv) Find the ratio of the area of sector AOBAOB of the original circle to the area of the new circle, expressing your answer in simplest form.

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