maths

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  • Created by: chloe
  • Created on: 16-05-13 18:42
whats the easiest way to find out percentage?
always divide by 100, then times by the number your trying to find the percentage of.
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list as many other numbers equvilant to 50%
50/100, 0.5
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how many different loci's are there?
4
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list as many locis as you can?
drawing a circle around a point, cutting an angle in half, same length circle around a line, two points on a line.
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what is pythagoras' theorem?
A squared + B squared = C squared, then find the root number.
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how do you find the area of a trapezium?
A = half (a+b) h, add both lengths then times the height, then half the answer.
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how do you find the mean?
add all numbers, then divide by how ever many numbers there are.
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how do you find the median?
put all numbers in order then find the middle number.
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how do you find the range?
biggest number - smallest number
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how do you find the mode?
the number that occurs the most
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how do you find the volume of somthing?
base x height x width (times all three lengths together) (cm cubed)
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how do you find the area of somthing?
length x width (cm squared)
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how do you find the perimeter of somthing?
add up all the sides together (cm)
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whats the name for any 4 sided shape?
a quadrilatrial
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what is a trapezium?
a shape with only one pair of parrallel lines.
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what is a parrallelogram?
a shape that has 2 parrallel lines but have 2 different lengths. (a squashed rectangle)
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what is a rhombus?
a shape that has 2 parrallel lines with all the same lengths. (a squashed square)
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name as many triangles as you can?
isosoles, equilatral, right angled, scalene.
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what is a isosoles triangle?
a triangle with a pair of parrallel lines.
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what is an equilatral triangle?
a triangle that has all equal lengths.
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what is a right angled triangle?
a triangled that always has a right angle.
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what is a scalene triangle?
a triangle that has all completely different lengths.
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name as many parts of the circle as you can?
diameter, radius, sector, tangent, circumfrence, segment, chord, arc.
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what is a diameter?
the line that goes right through the middle of the circle.
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what is the circumfrence?
the outer edge of the circle.
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what is the sector?
the area enclosed by an arc and two radi.
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what is an arc?
a part of the circumfrence.
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what is the cord?
a straight line joining any two points of the circumfrence of a circle.
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what is the segment?
the area inside a circle enclosed by an arc and a cord.
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what is the radius?
the distance from the centre to the edge, basically half of the diameter
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what is the tangent?
a straight line that touches the circle, only at one point (basically could be a line that goes across the bottom of the outer circle)
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how do you find the circumfrence of a circle?
pie x diameter
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how do you find out the area of a circle?
pie x radius squared.
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how do you find the area of a semi circle?
pie x radius squared, then divide by 2
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how do you find the area of 1/4? (or any other fraction)
pie x radius squared, then divide by 4 (or whatever number the bottom fraction is)
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if a bar chart is in the middle of the exam paper will it always have gaps?
yes
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when will a bar chart not have any gaps?
when the bar charts are towards the end of the paper
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what is always really important to remember with bar charts?
always label the axis
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how do you complete a pie chart from a table?
add up all the frequency, then 360 divide by the answer, then x the answer by the frequency, this will then give you the angle you need to draw on the pie chart.
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what do curcles always add up to?
360*
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what do triangles always add up to?
180*
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what do angles around a point always add up to?
360*
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name as many angles as you can?
right angle, obtuse angle, acute angle, reflex angle.
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what is a right angle?
angle always has to be 90*
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what is an obtuse angle?
an angle that is always more than 90* but less than 180*
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what is an acute angle?
an angle that is always less than 90*
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what is a reflex angle?
an angle that is always more than 180* but less than 360*
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Other cards in this set

Card 2

Front

list as many other numbers equvilant to 50%

Back

50/100, 0.5

Card 3

Front

how many different loci's are there?

Back

Preview of the front of card 3

Card 4

Front

list as many locis as you can?

Back

Preview of the front of card 4

Card 5

Front

what is pythagoras' theorem?

Back

Preview of the front of card 5
View more cards

Comments

georgesof9096

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thanks really helpfull

georgesof9096

Report

thanks really helpfull

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