10 In the diagram, ABCD is a trapezium in which AD 13 cm, AB 10 cm, BC DAB 90q . E and F are points on AD and AB respectively such that AE 20 cm and 6 cm and AF 8 cm. Find the area of the shaded region EFBC. Answer …………………………….... cm2 [3] 11 13 In the diagram, UTR is a straight line and TQR is an isosceles triangle such that QT that PQ // RS , UTQ 155q and PQT QR . Given 90q , find 155o (a) TQR , (b) TRS . Answer (a) TQR ............................q [2] (b) TRS .............................q [2] Yvonne Lee/BMSS/2017/1E/P1/EOY 72 2 (a) Find the interior angle of a regular 15-sided polygon. [2] (b) An n-sided polygon has 2 interior angles measuring 100q each and the remaining interior angles are qq each. Find an expression for q in terms of n. [2] 7 (a) Calculate the total surface area of the prism below. [3] (b) Mr Lee took 30 mins to drive from Jurong to Changi at an average speed of 72 km/h. He took the same route (but in the opposite direction) at an average speed of 5 km/h faster for his return trip. Find his average speed for the round trip correct to the nearest km/h. [4] 9 In the diagram, the shape is made up of trapezium ABFG, rectangle BCEF and semicircle CDE. Find (a) its perimeter, [3] (b) its area. [4] East Spring Secondary School Mathematics Department Do It Right. Always 10. S1Ex Maths Paper 1 2017 2SE In the given diagram, AB is parallel to CD and CG is parallel to BF, ∠ABF = 46° and ∠GCE = 108° . B A D C G E F State with reasons clearly, find the value of the following. (a) ∠CED (b) ∠CDB (c) reflex ∠DCG 2SE 2017 1E MATHS P1 Ans: (a) ______________° [2] (b) ______________° [2] (c) [3] Towards Excellence and Success 144 ______________° 7