NZ Level 3

Identify and Compare Angles

Lesson

Angles are everywhere we look and they help us measure how much something turns. There are angles right beside you now. Can you see any?

Let's explore some angles in Video 1.

When we open a door, we create an angle. As we open the door further, the angle increases (gets bigger). Can you see the angle we are creating in the door opening below? What happens when we open the door further?

In Video 2, we look at how similar objects can have different angles. Let's look at how angles can be bigger, smaller or the same.

Remember!

Even if we make the arms of an angle longer, the size of the angle doesn't change.

Which angle is bigger?

- ABAB

In the clocks shown, think of the angle from the minute hand to the hour hand going clockwise.

Which clock shows the bigger angle?

- ABAB

Think about the two angles shown below and fill in the blanks.

The arms in Angle $1$1 are

the same as

Ashorter than

Blonger than

Cthe same as

Ashorter than

Blonger than

CThe angle in Angle $1$1 is

smaller than

Alarger than

Bthe same as

Csmaller than

Alarger than

Bthe same as

C

Classify plane shapes and prisms by their spatial features