Year 9

Year 9

# The case of 30 and 60 degrees

## Lesson details

### Key learning points

1. In this lesson, we will look at the special cases of 30 and 60 degrees right angled-triangles.

### Licence

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## Video

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## Worksheet

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## Starter quiz

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### 5 Questions

Q1.
What is the name of the longest side in a triangle?
congruent
opposite
Q2.
Triangle Y has been enlarged. Work out the length of the base of triangle X.
1.5 cm
8 cm
Q3.
What is the size of the marked angle?
30 degrees
60 degrees
Q4.
What is the length of m?
2.5 cm
5 cm
Q5.
What is the length of the missing side?
4 cm
6 cm

## Exit quiz

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### 6 Questions

Q1.
a is half the size of the hypotenuse when 𝑥 = ?
30 degrees
45 degrees
Q2.
b = 10 cm when 𝑥 = ?
30 degrees
45 degrees
Q3.
What is the size of the angle marked x ?
15 degrees
60 degrees
Q4.
What is the length of the hypotenuse?
3.5 cm
5 cm