Annette is standing 50 m away from a Ferris wheel at a local fair. She always brings her clinometer to the fair with her and is able to measure the angle of elevation to the bottom and the top of the Ferris wheel. She finds that the angle of elevation to the top is 34° and the angle of elevation to the bottom is 11°. To the nearest metre, what is the radius of the Ferris wheel?
Ratios
A ratio is a comparison between two numbers of the same kind. It represents how many times one number contains another. It also represents how small or large one number is compared to the other.
Trigonometric Ratios
Trigonometric ratios give values of trigonometric functions. It always deals with triangles that have one angle measuring 90 degrees. These triangles are right-angled. We take the ratio of sides of these triangles.
Question 1:
A farmer has a triangular plot of land. One side of the land measures 800 m and another measures 600 m. If the
Question 2
From a boat sailing due East, a lighthouse is observed at a bearing of 050°.
After sailing for 6.5 km, the same lighthouse has a bearing of 025° from the boat.
Find the distance between the lighthouse and the present position of the boat.
Give your answer, in km, correct to one decimal place. Do not include the unit with your answer.
Question 3
What is the perimeter of an equilateral
Question 4
Annette is standing 50 m away from a Ferris wheel at a local fair. She always brings her clinometer to the fair with her and is able to measure the angle of elevation to the bottom and the top of the Ferris wheel. She finds that the angle of elevation to the top is 34° and the angle of elevation to the bottom is 11°. To the nearest metre, what is the radius of the Ferris wheel?
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