The height of the smaller bead is 0·8 centimetres and its area is 0·6 square centimetres. The height of the larger bead is 4 centimetres. Find the area of the larger bead. 19) Paving stones are in the shape of a rhombus. The side of each rhombus is 40 centimetres long. The obtuse angle is 110 °. Find the area of one paving stone. 4 20) A taxi fare consists of a call-out charge of £1·80 plus a fixed cost per kilometre. A journey of 4 kilometres costs £6·60. The straight line shows the fare, pounds, for a journey of kilometres. f d 3 (a) Find the equation of the straight line. (b) Calculate the fare for a journey of 7 kilometres. 2 21) Quadrilateral ABCD with angle ABC = 90 ° is shown below. AB = 4 metres • BC = 6·2 metres • CD = 7 metres • AD = 5 metres • 2 (a) Calculate the length of AC. (b) Calculate the size of angle ADC. 4
The height of the smaller bead is 0·8 centimetres and its area is 0·6 square centimetres. The height of the larger bead is 4 centimetres. Find the area of the larger bead. 19) Paving stones are in the shape of a rhombus. The side of each rhombus is 40 centimetres long. The obtuse angle is 110 °. Find the area of one paving stone. 4 20) A taxi fare consists of a call-out charge of £1·80 plus a fixed cost per kilometre. A journey of 4 kilometres costs £6·60. The straight line shows the fare, f pounds, for a journey of d kilometres. (a) Find the equation of the straight line. (b) Calculate the fare for a journey of 7 kilometres. 3 2 21) Quadrilateral ABCD with angle ABC = 90 ° is shown below. • AB = 4 metres • BC = 6·2 metres • CD = 7 metres • AD = 5 metres (a) Calculate the length of AC. (b) Calculate the size of angle ADC. 2 4