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maths revison (types of angles (angles in polygones (triangle- add to 180,…
maths revison
types of angles
right angle(equal to 90')
acute(between 0' and 90')
obtuse(between 90' and 180')
reflex(between 180' and 360')
angles on a straight line add up to 180'
angles in a triangle add up to 180'
angles in parallel lines
alternate angles- Z shape
corresponding angles- F shape
co-interior angles- C shape
vertically opposite angles- same opposite from eachother
angles in polygones
triangle- add to 180
quadrilateral- add up 360
pentagon- add up to 540
hexagon- add up to 720
octagon- add up too 1080
heptagon-add up to 900
sum of interior angles+ (
number of sides
- 2)x180
angles in polygons 2
sum of exterior angles of any polygon 360
360/5 (divide)=72
interior angle+exterior angle=180
180-72=108
mmmr
mode-
the one you see the most
eg:
2
,4,1,0,3,
2
,4,
2
--
2
is the most common
median
-is found when arranging the numbers in order then selecting the middle value
47,44,51,58,32,55,49
--->now put them in order -- 32,44,47,
49
,51,55,58
range
-Largest value - smallest value
mean
-found by adding up all the values and dividing by the number of values
bearings