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Year 10
Core

Substitute the exact values to find a missing length

icon-background-square
Year 10
Core

Substitute the exact values to find a missing length

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Lesson details

Key learning points

  1. In this lesson, we will find a missing length of a right angled triangle using prior knowledge of exact trigonometry ratios for 0°, 30°,45°,60° and 90°
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3 Questions

Q1.
Which angles of the trigonometry ratios will this triangle help you to find?
An image in a quiz
0°, 30°,45°,60° and 90°
Correct answer: 30° and 60°
45°
Others
Q2.
Which angles of the trigonometry ratios will this triangle help you to find?
An image in a quiz
0°, 30°,45°,60° and 90°
30° and 60°
Correct answer: 45°
Others
Q3.
Find the missing angle in the triangle below.
An image in a quiz
30°
Correct answer: 45°
60°
Others

3 Questions

Q1.
Find the length labelled x without a calculator.
An image in a quiz
15 mm
Correct answer: 25 mm
50mm
Others
Q2.
Find the length labelled x without a calculator.
An image in a quiz
Correct answer: 24 cm
6 cm
8√3
Others
Q3.
Find the missing length labelled x without using a calculator.
An image in a quiz
0.5√3 cm
Correct answer: 2√3 cm
8 cm
Others