Pre- Pythagoras and trigonometry work

Pre- Pythagoras and trigonometry work

By Simone Tynan

Squares

A square number is the result when a number has been multiplied by itself.

So:

5² = 5 x 5 = 25

3² = 3 x 3 = 9​

Some text here about the topic of discussion

Complete the following questions

Square roots

A square root is the opposite of a square.

The "root" of the square is the number that was used to make the square.

How can I work out the square root of a number?

​

1. Use the ​table at the back of your exercise book:

   • The numbers underlined in red are all squares.

   • Just find the two identical numbers that equal them​.

​

How can I work out the square root of a number?

​

Look at 9​.

What are the two identical numbers that multiply to equal 9?​

3 x 3 = 9​

​

​See if you can do the same for 16, 25 and 36.

Scientific calculator?

​To make sure you can see the scientific calculator:

1) Open your computer calculator.

2) Click on View (at the top of the screen)

3) Click on Scientific.​

How can I work out the square root of a number?

On your calculator:

1) Type in the number you want to find the square root for.

2) Click on the symbol that looks like a tick √​ (It might not have a 2. )

​

​

Complete the following questions

Proof that angles in a Δ = 180​°

Right-angled triangles

In right-angled triangles, one angle = 90°

We often show a right-angle by putting a little square.

​

Right-angled triangles

The opposite side is the hypotenuse

Opposite the 90° angle is the longest side.

It is called a hypotenuse.​

​

Right-angled triangles = 180​°

If a triangle = 180​° and the right angle = 90​°

How much do the other angles equal?

​

180​° - 90​°​ = 90​°​

​

Complete the following questions

Fill in the Blanks

Fill in the Blanks

Fill in the Blanks

Complete the following 11 revision questions.

Fill in the Blanks

Fill in the Blanks

Fill in the Blanks

Fill in the Blanks

Fill in the Blanks

Fill in the Blanks

Fill in the Blanks