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71204
Year 7 Angles and Polygons
Description
GCSE Maths (Year 7) Mind Map on Year 7 Angles and Polygons, created by Ellen Billingham on 05/05/2013.
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maths
year 7
maths
year 7
gcse
Mind Map by
Ellen Billingham
, updated more than 1 year ago
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Created by
Ellen Billingham
over 11 years ago
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Resource summary
Year 7 Angles and Polygons
Angles
Alternate
Are equal
In a 'Z' shape
Corresponding
Are equal
They are in an 'F' shape
One above and one below or one on the left and one on the right
Polygons
Quadrilaterals
Square
Has 4 equal sides
Has 4 equal angles
90 degrees
2 pairs of parallel sides
4 lines of reflection symmetry
Rotation order 4
Rectangle
4 equal angles
90 degrees
2 pairs of parallel sides
Rotation order 2
2 lines of symmetry
2 pairs of equal sides
Kite
1 line of symmetry
1 pair of equal angles
Rotation order 1
2 pairs of equal sides
Parallelogram
2 pairs of equal angles
2 pairs of equal sides
2 pairs of parallel sides
Rotation order 2
Trapezium
1 pair of parallel sides
Rotation order 1
Can have 1 line of symmetry if it's isosceles
Rhombus
4 equal sides
2 pairs of equal angles
No lines of symmetry
rotation order 2
Interior angles
To find them you do 180 - the exterior angle
eg for a pentagon you would do 180 - 72 = 108 degrees
They are the angles inside a shape
Exterior angles
They always add up to 360
They are the angles between where one side would have gone if it was longer, and the side next to it
To find them you do 360 divided by how many sides there are
eg for a pentagon you would do 360 divided by 5 = 72 degrees
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