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Solve this: and difference iS 'ne angles. angles Of a mangle are in the ratio 1 : 2 : 3. Find the vertical angle of an isosceles triangle is —rd or each of its base angles. Find it in radians. 12. If the arcs length angles no iS a right-angled triangle. the difference two 13. Show a so on 'he hand a angles is — in circular measure. Express the angles (b) Find the angle &grees. minute-hand of a clock at three Short Answer Type Questions (SATQ) 14. If G D and e be the number of grades, degrees and radians in any angle. prove that : D G 200 9 10 9 IS. find the circular measure of an internal angle of a regular: (D pentagon (ii) hexagon (iii) polygon of 40 sides. 16. (i) The angles of a triangle are in A.P. and the greatest angle of the triangle is double the least radians in the greatest is N. find angles in degrees and radians, (iii) The angles of a triangle are A.P. and one them is 800. Find all the angles in system. (iv) The angles of a triangle are in A.P. and the greatest is 840. Find ail the three angles in radians. 17. The angles of a quadrilateral are in and angle is double the least, find the angle in radians. (H.P.B. angle, find the greatest angle in radians. 18. The minute hand ofa watch is cm long. How many (ii) The angles of a triangle are in A.P. and the cm. does its extremity move in 40 minutes number of degrees in the least to the number of (N.C.E.R.T.; (User = 3-14)