# Maths revision cards

maths revision.

- Created by: Katrina Carr
- Created on: 18-01-11 12:45

## recognise types of angles

90degrees=?

smaller than 90degrees=?

180degrees=?

bigger than 180 but smaller than 360degrees=?

bigger than 90 but smaller than 180degrees=?

90 degrees=right angle.

smaller than 90degrees=acute angle.

180degrees=straight line.

bigger than 180 but smaller than 360degrees=reflex angle

bigger than 90 but smaller than 180degrees=obtuse angle.

## parrallel and perpendicular lines and angles

vertically opposite angles are...?

Alternate angles are..?

corresponding angles are...?

whats the tranversal line..?

definition of perpendicular..?

equal

equal

equal

- a line that cuts through parallel lines

-at right angles; two lines at right angles to eachother

## Recognise triangle types

Isosceles?

Equilateral?

Scalene?

Right triangle?

Isosceles-2 sides are congruent

Equilateral-all the sides are congruent, all angles are congruent

Scalene-none of the sides are congruent, no congruent angles

Right triange-right angle(90degrees)

## Expanding brackets, and collecting like terms.

a(a) = ?

5(2) = ?

5(a) = ?

a(b) = ?

5(a+2) = ?

a(a) = a*a = a to the power of 2.

5(2) = 5*2 = 10

5(a) = 5*a = 5a

a(b) = a*b + ab

5(a+2) = 5a+10

5(a) + 5(2) = 5a + 10

## Area of triangles, trapeziums and kites.

Area of a triangle?

Area of a trapezium?

Area of a kite?

Area of triangle = bass times height divided by 2

Area of a kite= half the product of its diagonals.

Area of a trapezium=half the sum of the parrallel sides times the perpendicular height

## Circumfrence using pie=3.14

whats a circumfrence?

whats the radius?

whats the diameter?

whats the tangent line?

circumfrence=perimetre of a circle

radius=distance from centre of a circle to the exterior

diameter=twice the size of the radius, chord which passes through the centre

tangent line= the line that goes all the way around the circle on the outside

## pie=3.14 method

Example: diameter=7

To find the Circumfrence= pie times diamerter (pie*d) = 3.14*7

semi-circle:

C=pie*d divided by 2 then make sure to ADD the diameter.

## shapes and there angle measurements

4sides=quadrilateral=360degrees

5sides=pentagion=540degrees

6sides=hexagon=720degrees

7sides heptagon=900degrees

## technical terms for linear graphs

m=?

c=?

gradient=?

m=gradient

c= y intercept

gradient=rise/run

## Inverse operation!

TIP: WHAT EVER YOU DO TO ONE SIDE YOU HAVE TO DO TO THE OTHER.

Example:

6+a=11

-6 -6

left with a=5 = the answer

inverse operations:

+ -

- +

times divide

divide times

B << always start from bottom <<<

I

D

M

A

S

## C GRADE EXAMPLE

4 2y

-- = ----

3 9

*9 *9

4 9

-- * --- = 2y

3 1

36

---- = 2y

3

12 = 2y

y = 6

BLAHHHHHH

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