Year 7

# Exploring intersections

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## Slide deck

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## Lesson details

### Key learning points

- In this lesson, we will learn how to understand the properties of parallel lines.

### 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.

## Video

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### 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

### 5 Questions

Q1.

The definition of a 'parallel line' is...

Lines that go on forever

Lines that intersect at a 32 degree angle

Lines that intersect at a 90 degree angle

Q2.

Is it possible to draw a hexagon with three pairs of parallel sides?

No

Q3.

Is it possible to draw a triangle with a pair of parallel sides?

Yes

Q4.

If I draw a pair of lines and they both form a 70 degree angle with the horizontal, are they parallel?

No

Q5.

If I draw a pair of lines and one line forms a 20 degree angle with the horizontal, and the other forms a 20.01 degree line with the horizontal, are they parallel?

Yes