is a triangle. = 8.7 cm. Angle = 49. Angle = 64. ABC AB ABC ACB Calculate the area of triangle ABC. Give your answer correct to 3 significant figures. ..............................................cm2 (Total for Question 24 is 5 marks) [Nov 2011 Calc] 20. is a trapezium. is parallel to Angle = 90°. Angle = 62°. PQRS PQ SR. PSR PRS = 14 cm. = 8 cm. PQ PS (a) Work out the length of PR. Give your answer correct to 3 significant figures. ............................... cm (3) (b) Work out the length of QR. Give your answer correct to 3 significant figures. ............................... cm (4) (Total 7 marks) [June 2011 Calc] 25. = 8 cm. AC = 3 cm. AB = 19 cm. DE Angle = angle = angle = 90°. ABC CBD BDE Angle = 50°. BDC
ABC is a triangle. AB = 8.7 cm. Angle ABC = 49. Angle ACB = 64. Calculate the area of triangle ABC. Give your answer correct to 3 significant figures. ..............................................cm2 (Total for Question 24 is 5 marks) [Nov 2011 Calc] 20. PQRS is a trapezium. PQ is parallel to SR. Angle PSR = 90°. Angle PRS = 62°. PQ = 14 cm. PS = 8 cm. (a) Work out the length of PR. Give your answer correct to 3 significant figures. ............................... cm (3) (b) Work out the length of QR. Give your answer correct to 3 significant figures. ............................... cm (4) (Total 7 marks) [June 2011 Calc] 25. AC = 8 cm. AB = 3 cm. DE = 19 cm. Angle ABC = angle CBD = angle BDE = 90°. Angle BDC = 50°.