Know your angle facts!

Angle questions

Angles in polygons

To find an EXTERIOR angle of a REGULAR polygon

(all sides the same, all angles the same):

Do 360 divided by the number of sides.

Circles

Volume of prisms

Transformations

**Pythagoras**

**Use this when you have two sides of a right-angled**

triangle, and need the other side.

triangle, and need the other side.

**Geometry**

Alternate

Corresponding

Opposite

Look for F, Z, X shapes

The INTERIOR angle is 180 minus the exterior angle.

You get this on the formula page at the front of the exam.

Does the shape look exactly the same,

only in a different place?

TRANSLATION

- you need

Is the shape bigger / smaller?

ENLARGEMENT

- you need

Can you find a mirror line?

REFLECTION

- you need

None of the above?

ROTATION

- you need

how far across

how far up/down

Centre

Centre of enlargment

Scale factor (how many times bigger?)

The mirror line

Centre of rotation

Angle of rotation

Direction (clockwise/anticlockwise)

**Trignometry**

Alternate

Corresponding

Opposite

Adds to 180

Vectors

The first mark of a vectors question can be pretty simple.

Using the

formula page

Use this formula if they ask you for the area of a NON right-angled triangle:

Bearings

Circle theorem facts