Year 10
Higher
Use tangent to find a length
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Lesson details
Key learning points
- In this lesson, we will calculate missing lengths using the tangent trigonometric ratio.
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4 Questions
Q1.
Has this triangle been correctly labelled?
Yes
Q2.
Why has this triangle been incorrectly labelled?
Adjacent and opposite need switching
Hypotenuse and opposite need switching
It’s not incorrect
Q3.
Which is the correct trigonometric ratio to use to calculate length y?
Cosine
Tangent
Q4.
Which trig ratio would I use to calculate the diameter of the circle?
sine
tangent
4 Questions
Q1.
Solve the equation to 1 decimal place
x = 10.0
x = 200.0
x = 28.3
Q2.
Find the length of y, to 3 significant figures
0.16 m
6.23 m
Q3.
Find the length AC, to 2 decimal places
0.14 km
9.29 km
Q4.
Calculate the perimeter of this rectangle, to 3 significant figures
15.77 cm
15.8 cm
47.3 cm