Year 7

# Finding unknown angles

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## Lesson details

### Key learning points

- In this lesson, we will learn how to use the term 'vertically opposite' and solve more angle problems.

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

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### 5 Questions

Q1.

If Angle A is greater than Angle B, how can I express this mathematically?

A < B

A = B

B > A

Q2.

If Angle Y = Angle X = Angle Z, which of the following is true?

X + Y + Z = 180

X + Y + Z = 3A

X + Y = Z

Q3.

If g > h, then which of the following results in the greater value?

180 - g

The previous two responses result in the same amount

Q4.

You are given that: 360 - R = S. Which of the following statements is correct?

360 + S - R = 0

360 = S - R

S = 180

Q5.

If I have 5 equal angles around a point, what do each of the angles individually equal?

36 degrees

360 degrees

90 degrees

### 5 Questions

Q1.

A circle split into 4 equal parts would result in the equal angles around the centre point being...

180 degrees

360 degrees

60 degrees

Q2.

If a regular octagon was split into 8 equal parts, each equal angle at the centre would be...

360 degrees

60 degrees

90 degrees

Q3.

You are given that: a + a + a + a = 180. What is the value of a?

180

60

720

Q4.

If I have an equilateral triangle and a square around a point, what is the remaining angle left?

150 degrees

60 degrees

90 degrees

Q5.

If each of the angles on a straight line are 50, 60, x and y, what is x?

110 degrees

180 degrees

70 degrees