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About Me
I am a year 10 student, 15 years old. I enjoy all sports but particularly football. I play for a football team and I'm part of an athletics club.
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New Rickstones Acandemy
multiplication.com
Funbrain
Simple and Compound interest
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Simple and compound interesrt
Graphs
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Straight line graphs
Straight line graphs show a a line slanting to the right or left. For example, with Y=3X+1 you would end up with a graph like 'Figure 1'.
Quadratic graphs
Quadratic graphs create a single curve in the line. (Figure 2)
Cubic graphs
Cubic Graphs create a double curve, one to the right and the other to the left. (Figure 3)
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Quadratic graph
Figure 2
Cubic graph
Figure 3
Straight graph
Figure 1
Histograms
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Histograms look similar to bar charts. DO NOT GET THESE MIXED UP. ---------------------------->
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The values on a Histogram are measured by the area of the bars.
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Formula! Area = frequency = Frequency density x class width SO...... Frequency density = frequency ÷ class width
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Simultaneous Equations
Bounds
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Vectors
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Area of a Sector
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Area of sector = angle/360 x πr²
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so... angle = 120 radii = 42" 120/360 = 1/3 42 x 42 = 1764 = 0.33333 1764 x π = 5541.77 5541.77 x 0.33333 = 1847.26" area of sector = 1847.26" <-------------------------
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Length of an Arc
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Length arc = angle/360 x 2πr
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so... angle = 120 radii = 42" 120/360 = 1/3 42 x 2 = 80 = 0.33333 80 x π =251.33
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Area of Triangles
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1/2 ab sin C
So side a is 10cm. side b is 8cm. and angle C is 50° the area will be 30.64
(hxb) /2
So the height is 10cm and the base is 8cm. the area will be 40cm
Herons formula
So
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Herons formula
