maths formulas.pdf
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8/17/2019 Maths Formulas.pdf
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Maths Formulas Year 10
Surface Area and Volume
Surface are
2πr 2πrh a of a cylinder
Surface area
of a cone
l = slant height
Surf
4
ace area of a sphere
Volume
of
a pyramid
Volume o
f a cone
Volume
of a sphere
Volume and capacity
1m3
=
1kL
1cm3
=
1mL
Quadratic Formula
√
Saving and Borrowing
Compound I
1
nterest
Depreciation
1
Coordinate Geometry
Distanc formula
e
Parallel & Perpendicular lines
Parallel
if:
m1 m2
Perpendicular
if:
m1 x m2 ‐1
Point‐gradient form of a linear
equation
Tests fo r quadrilaterals
Parallelogram
• Both opp. angles =
• Both opp. sides =
•
Both
opp.
sides
||
• One opp. sides = & ||
• Diagonals bisect
Rectangle
• All angles 90o
• Diagonals = & bisect
Rhombus
• All sides =
• Diagonals bisect @ 90o
Square
• All sides = AND 1 x 90o angle
•
Diagonals
=
&
bisect
@
90o
Trigonometry
Trigonometric ratios of
ngles complementary a
sin cos90
cos sin90
Tangent ra
tan
tio
Exact trigonometric ratios
Unit circle
s in y‐coordinate of
x‐coordinate of
cos
tan ‐ x‐coordinate of
Acute Angles
sin(180 – A) = sin A
cos(180 – A) = ‐cos A
tan(180 – A) = ‐tan A
1.
The
trigonometric
ratios
of
acute
angles
are
all
positive.
2.
Only
the
sine
ratio
of
obtuse
angles
is
positive.
The
cosine
and
tangent
ratios
of
obtuse
angles
are
negative.
S e u e in R l
Two
sides
and
two
angles
opposite
them.
Cosine Rule 2cos
cos
Three
sides
and
one
angle.
Area of a trian
gle
sin
1
1
√ 2 45o
45o
30
o
2√ 3
60o
1