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Shapes.

Square has 4 equal sides with equal angles Each angle adds up to 900 so the internal angles will equal 3600 It has 4 lines of symmetry and rotational symmetry order 4

Triangle

There are three types of triangle

1. equilateral

2. right angled

3. isosceles

the equilateral triangle has 3 equal sides and all the angles add to 1800 and the angles are equal so then the angles will equal 60o the triangle has 3 lines of symmetry and rotational symmetry order 3

right angled triangle no equal sides no lines of symmetry unless the angles are 450 one angle will equal 900 and the other 2 will equal 900

the last one is isosceles. It has no angles that are equal no rotational symmetry, but it does have 1 line symmetry and 2 sides that are equal and 2 angles that are equal

circle

circles have many different parts that have names and some of them are circumference, radius, diameter, chord, segment and tangent

to work out the area and circumference you will all was needed pie;

pie = 3.14 (rounded)

the formula for working out area is

pie x r2

and the formula for circumference

Pie x diameter

Hexagon which everyone would recognize has 6 equal angles which add you 2 900 and in that case have six lines of symmetry and rational symmetry order 6

Pentagon has 5 sides and a regular pentagon would have angles of 720 and the have 1 line of symmetry and rational symmetry order 1 as well Shapes

 

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Maths

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