1) A circle is BEST described as a) A full turn. b) A plane figure. c) A series of connecting points of equal distance from a centre. d) A series of points connected to a center. 2) Which statement BEST describes the radius of a circle? a) A chord passing through the centre which cuts the circle in half. b) The distance from the circumference to the centre of a circle. c) The distance from one point on the circumference to another point. d) The boundary or perimeter of the circle. 3) Which is FALSE concerning the diameter of a circle? a) It is twice the radius of the circle. b) It is half the radius of the circle. c) It is a chord which cuts the circle in halves. d) It passes through the centre of the circle. 4) If the radius of a circle is 5.4 cm, its diameter is a) 10.8 cm b) 2.7 cm c) 5.4 cm d) 17 cm 5) A circle has a radius of 7cm, what is its perimeter?  Use ⫪ as 22/7. a) 44 cm b) 88cm c) 3.5 cm d) 22cm 6) What is the area of a circle whose diameter is 20mm? Use ⫪ as 3.14. a) 40cm2 b) 62.8 cm2 c) 400 cm2 d) 314.2 cm2 7) If the area of a circle is 620 mm2 . What is the area of a quadrant of that circle? a) 155 mm2 b) 310 mm2 c) 624mm2 d) 90mm2 8) What angle in degrees is found in a semi-circle? a) 360 b) 90 c) 270 d) 180 9) A sector has a) 2 radii, an angle, an arc and sometimes a chord. b) 1 radius, an angle and an arc c) an arc and a chord. d) a triangle, an arc, 1 radius. 10) A segment is bounded by a) an arc, a chord and 2 radii b) an arc and a chord c) a chord, an angle and an arc d) an arc and a sector 11) calculate the area of the sector AB. Use ⫪ as 3.14. a) 21.2 cm2 b) 63.59cm2 c) 11.97cm2 d) 120cm2 12) What is the arch length? Use ⫪ as 3.14. a) 21.2cm b) 11.97cm c) 63.59cm d) 9.32cm 13) What is the perimeter of the sector? Use ⫪ as 3.14. a) 6.75 cm b) 2.97 c) 18.32cm d) 28.26cm 14) Which below can be used to determine the area of a segment? a) Area of sector + area of triangle b) Area of sector - area of triangle c) Area of sector/ area of triangle d) Area of triangle - area of sector 15) Determine the area of the triangle.  a) 28cm2 b) 92.1 cm2 c) 98cm2 d) 119.5cm2 16) Determine the area of the segment. a) 119.5cm2 b) 92.1 cm2 c) 98cm2 d) 27.4cm2

Circles Exam

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