ATLIB 2007 Q 26-50

27. 27. Convert 18 cm² to m².

• 0.0018

• 0.18

• 1, 800

• 180, 000

28. In the diagram below (not drawn to scale), the length of the minor arc AB is equal to

• π x r²

• 30 x 2πr

•  30x πr²

  ³⁶⁰

• (30 x 2πr)/360

29. A bearing of 270° is a direction due

• North

• South

• East

• West

30. The diagram below (not drawn to scale) shows the letter A and its image under the transformation represented by a

• reflection in the x-axis

• reflection in the y-axis

• reflection in the origin

• rotation of 90° about the origin

31. In the figure below (not drawn to scale), P, Q and R are the centers of three circles of radii 4, 3 and 2 centimeters respectively.  The perimeter of triangle PQR

• 9 cm

• 14 cm

• 18 cm

• 24 cm

32. In the rhombus ABCD given below (not drawn to scale), y is equal to

• 90 + x

• 90 – x

• 180 – x

• 180 – 2x

33. If cosA =  5/13 and angle A is acute, then the exact value of sinA is

• 12/13

• 13/12

• 12/5

• 13/5

34. In the diagram below (not drawn to scale) triangle ADE is an enlargement of triangle ABC.  What is the scale factor of the enlargement?

• 1/2

• 2

• 3

• 4

35. A parallelogram ACDE and a square FGHI have the same area.  If the length of ED = 18cm and BE = 8cm, then find the length, in centimetres, of one of the sides of the square.  [see the figures shown below, not drawn to scale.]

• 12

• root of 72

• 72

• 144

36. The diagram below (not drawn to scale) shows rectangle PQRS which is made up of 8 squares, each of area 4cm².  The area of triangle PTS in cm² is

• 3

• 12

• 32

• 48