• Properties of rectangles and square

• Finding unknown angles

What will we learn today?

Geometry Rectangles and Squares

We can find angles in rectangle and square.

Let’s look at some examples.

Angles in a Rectangle

We can find 4 right angles in a rectangle.

Angles in a Square

We can find 4 right angles in a square.

Try this out! How many angles can you see?

Try this out! How many angles can you see?

There are 4 angles.

Try this out! How many angles are greater than 90°?

Try this out! How many angles are greater than 90°?

Try this out! How many angles are smaller than 90°?

Try this out! How many angles are smaller than 90°?

How many right angles can you see?

How many right angles can you see?

Angles in a Square

If ∠z = 30°, what is ∠y?

z

y

Angles in a Square

A right angle = 90°.

To find ∠y, we must make use of ∠z.

Since ∠z = 30°,

∠y = 90°- 30° = 60° z

y

Are you ready to try out the questions?

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