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Exam-Style Questions.Problems adapted from questions set for previous Mathematics exams. |
1. | GCSE Higher |
An arborist sights the top of a tree using a clinometer and reads the angle of elevation to be 29o. Her clinometer is 28 metres from the base of the tree and is on a tripod making it 1.5 metres above ground level.
This diagram is not drawn to scale.
Calculate the full height of the tree.
2. | GCSE Higher |
The diagram shows a right-angled triangle and a semicircle. The straight side of the semicircle is the same length as the longest side of the triangle.
Work out the area of the semicircle.
Give your answer correct to 3 significant figures.
You must show all your working.
3. | GCSE Higher |
The diagram shows a trapezium where the sides AC and BD are parallel.
Calculate the length of side CD
4. | GCSE Higher |
Taptaya Park Tower is over two hundred metres tall. There is a zip wire from the observation deck to a point on the ground 550 metres away in a northerly direction.
(a) If the beginning of the zip wire is 210 metres above the ground find the angle of depression of the end point of the zip wire as seen from the beginning.
It is decided that the zip wire is slightly too steep so the end point is moved so that it is now further away.
(b) Find the horizontal distance if the angle of elevation of the beginning of the zip wire as seen from the end is now 18o.
5. | IB Studies |
Neung is at Bangkok's Suvarnabhumi Airport watching the planes take off. He observes a plane that is at an angle of elevation of 25o from where he is standing at point N. The plane is at a height of 390 metres as can be seen in the following diagram (not to scale).
(a) Calculate the horizontal distance, NH, of the plane from Neung. Give your answer to the nearest metre.
The plane took off from a point T, which is 230 metres from where Neung is standing, as shown in the following diagram (not to scale).
(b) Calculate the angle ATH, the take-off angle of the plane to the nearest degree.
6. | IB Studies |
The Tamarack triathlon race consists of swimming, cycling and running. Competitors swim from A to B, then cycle from B to C and finally run from C back to A.
Angle ACB is 22o.
It takes Walter 10 minutes and 20 seconds to cycle from B to C at a speed of 29kmh-1.
(a) Find the distance from B to C in kilometres.
The distance from C to A is 4 kilometres. Running this part of the course takes Walter 25 minutes.
(b) Calculate the speed, in kilometres per hour, that Walter runs from C to A.
(c) Calculate the distance, in kilometres, from A to B.
(d) Calculate the total distance, in kilometres, of the triathlon course.
(e) Find the size of angle ABC.
(f) Calculate the area of the triathlon course bounded by the lines AB, BC and CA.
7. | GCSE Higher |
Rectangle ABCD is the horizontal base of a trapezoidal prism ABCDEFGH.
EF is parallel to AB. BC = 20cm, DC = 150mm, GC = 74mm, HG = 86mm and AE = BF.
(a) Find the size of angle ABF.
(b) Show that FD = 242 mm correct to 3 significant figures.
8. | IB Studies |
ABC is a triangular car park on horizontal ground. The length of AB is 90m and the length of AC is 65m. The size of angle BCA is 68o.
(a) Find the size of angle ABC.
(b) Find the area of the triangular car park.
M is the midpoint of AC.
(c) Find the length of BM.
A vertical flag pole, FB, is erected in one corner of the car park with its base at B.
The angle of elevation of F from M is 55.3o. H is the midpoint of the flag pole.
(d) Calculate the angle of elevation of H from M.
9. | IB Analysis and Approaches |
Two towers are situated close to each other on level ground. From point C on the ground directly between the two buildings, the angle of elevation to the top of each tower is \( \theta \).
The distance from point C to point A at the top of the taller building is 131 metres.
The distance from point C to point B at the top of the shorter building is 91 metres.
The distance between A and B is 141 metres.
Find the heights of the two towers to the nearest metre.
10. | IB Analysis and Approaches |
The diagram below shows triangle ABC and the lengths of its sides. It is known that the cosine of angle \(C\hat{A}B\) is one third.
Find the area of the triangle giving your answer in the form:
$$ m \sqrt{n} \text{ where } m, n \in \mathbb{Z}^+ $$11. | IB Analysis and Approaches |
Consider a triangle DEF, where DF= 15cm, FE = 9cm and EDF = 21°.
Find the largest possible perimeter of triangle DEF.
12. | IB Studies |
Christine owns a four sided piece of land shown in the diagram below as ABCD. The length of BC is 180 m, the length of CD is 70 m, the length of AD is 90 m, the size of angle BCD is 82° and the size of angle BAD is 102°. The diagram is not to scale
Christine decides to sell the triangular portion of land ABD. She first builds a straight fence from B to D.
(a) Calculate the length of the fence.
The fence costs 19 USD per metre to build.
(b) Calculate the cost of building the fence. Give your answer correct to the nearest USD.
(c) Show that the size of angle ABD is 28.6°, correct to three significant figures.
(d) Calculate the area of triangle ABD.
She sells the land for 110 USD per square metre.
(e) Calculate the value of the land that Christine sells. Give your answer correct to the nearest USD.
Christine invests 200 000 USD from the sale of the land in a bank that pays compound interest compounded annually.
(f) Find the interest rate that the bank pays so that the investment will double in value in 12 years.
13. | IB Studies |
A builder marks out three points A, B and C on the ground such that AB = 11m , AC = 15m and angle BAC = 124o.
(a) Calculate the length of BC.
He next marks a fourth point, D, on the ground at a distance of 12m from B, such that angle BDC is 53o.
(b) Find the size of angle DBC.
(c) Find the area of the quadrilateral ABDC.
The builder digs up and removes the soil under the quadrilateral ABDC to a depth of 90 cm for the foundation of the house.
(d) Find the volume of the soil removed. Give your answer in m3
To transport the soil removed, the builder uses cylindrical drums with a diameter of 46cm and a height of 70cm.
(e) Find the volume of a drum. Give your answer in m3.
(f) Find the minimum number of drums required to transport the soil removed.
14. | IB Studies |
A drone flying test course is in the shape of a triangle, ABC, with AB = 400m , BC = 600m and angle ABC = 44o. The course starts and finishes at point A.
(a) Calculate the total length of the course to the nearest metre.
It is estimated that a drone can travel at an average speed of 4.5ms–1.
(b) Calculate an estimate of the time taken to fly around the course. Give your answer to the nearest minute.
(c) Find the size of angle ACB.
To comply with safety regulations, the area inside the triangular course must be kept clear of people, and the shortest distance from B to AC must be greater than 275 metres.
(d) Calculate the area that must be kept clear of people.
(e) Determine, giving a reason, whether the course complies with the safety regulations.
The course is viewed from a tower which rises vertically from point A. The top of the tower is point T. The angle of elevation of T from B is 8o.
(f) Calculate the vertical height, AT , of the tower.
15. | IB Analysis and Approaches |
Emma sails in a small dinghy from point A in a straight line to a buoy at point B. She is moving at an average speed of 19 km/h, for 6 minutes, on a bearing of 125°.
(a) Find the distance from point A to point B
(b) When Emma arrives at point B she changes direction and sails to point C on a bearing of 230° and 1 km away. Find angle ABC
(c) Find the distance from point A to point C.
(d) Find angle BCA
(e) Emma’s friend Eamonn wants to swim directly from point A to point C. Find the bearing that Eamonn must take to point C.
(f) Eamonn swims at an average speed of 3.2 km/h. Find, to the nearest minute, the time it takes for Eamonn to reach point C.
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