Maths

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Area

If the shape is on squared paper, count the squares.

The units of area are squared (cm2, m2, km2)

Area of a rectangle
Length x Width

Area of a triangle
1/2 x Base x Height

Area of a parallelogram
Base x Height

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Questions

Q) Angles in a straight line = ?
A) 180 degrease

Q) Angles in a circle = ?
A) 360 degrease

Q) A right angle = ?
A) 90 degrease

Q) What is the name given to the angle less then 90 degrease?
A) Acute

Q) What is the name given to the angle more the 90 degrease?
A) Obtuse

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Quadrilaterals

Square

  • All sides are equal
  • All angles are equal
  • Diagonals bisect each other and cross at right angles

Rectangle

  • Opposite sides are equal
  • All angles are equal
  • Diagonals bisect each other

Trapezium

  • Two unequal sides are parallel
  • Interior angles add up to 180 degrease
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Quadrilaterals

Parallelogram
Opposite sides are equal and parallel
Opposite angles are equal
Diagonals bisect each other

Rhombus
All sides are equal
Opposite sides are parellel
Opposite angles are equal
Diagonals bisect eachother and cross at right angles.

Kite
Two pairs of sides are equal
One pair of opposite angles are equal
Diagonals cross at right angles

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Transformations

Translations
This means that the shape is moved but still looks exctuly the same

A translation is described by a vector.

The top number in the vector is the movement(Left or Right.) Positive values move to the right. Negative values more to the left.

The bottom number in the vector is the movement (Up or Down). Positive values move up. Negative values move downwards.

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Transformation

Reflection
When a shape is reflected it becomes a mirror image if itself.

A reflection is described in terms of a mirror line.

Rotations
When a shape is rotated it is turned around.

The rotation will be clockwise/anticlockwise.
Turned - 90, 180, 270, 360 degrease.

Enlargement
When a shape is enlarged it is made bigger.

It has a scale factor, and some have a point were the shape has been enlarged.

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Comments

alex

thanks :D

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