Question In the diagram, D lies on the side AB of triangle ABC and CD is an arc of a circle with centre A and radius 2 cm. The line BC is of length 2√3 cm and is perpendicular to AC. Find the area of the shaded region BDC, giving your answer in terms of and . Solution […]
Question The diagram shows a sector of a circle with centre and radius 20 cm. A circle with centre and radius cm lies within the sector and touches it at P, Q and R. Angle POR = 1.2 radians. i. Show that , correct to 3 decimal places. ii. Find the total area of the three parts of the […]
Question The diagram shows a sector OAB of a circle with centre O and radius . Angle AOB is radians. The point C on OA is such that BC is perpendicular to OA. The point D is on BC and the circular arc AD has centre C. i. Find AC in terms of and . ii. Find the […]
Question In the diagram, AB is an arc of a circle with centre O and radius . The line XB is a tangent to the circle at B and A is the mid-point of OX. i. Show that angle radians. Express each of the following in terms of, and : ii. the perimeter of the shaded region, iii. the area of the shaded region. […]
Question The diagram shows a metal plate made by removing a segment from a circle with centre O and radius 8 cm. The line AB is a chord of the circle and angle AOB = 2.4 radians. Find i. the length of AB, ii. the perimeter of the plate, iii. the area of the plate. Solution i. […]
Question In the diagram, ABC is an equilateral triangle of side 2 cm. The mid-point of BC is Q. An arc of a circle with centre A touches BC at Q, and meets AB at P and AC at R. Find the total area of the shaded regions, giving your answer in terms of and . Solution It […]