Chap. 1 - Measurement Flashcards
What is the formula for finding the upper and lower limit / boundary to a measurement?
measurement +/- 0.5 * smallest unit of mesurement
How do you find the smallest unit of measurement?
Take the LAST NUMBER in the measurement taken and make it the number “1”.
Make all the numbers before that “1” a zero.
e.g 7.052 = 0.001 is the smallest unit of measurement
What is Pythagoras Theorum?
a^2+b^2=c^2
List the common base units
Meters, Litre, Gram, Joule
Base unit -> Kilo
/1000
Kilo -> Mega
/1000
Mega -> Giga
/1000
Giga -> Tera
/1000
Tera - Giga
*1000
Giga -> Mega
*1000
Mega -> Kilo
*1000
Kilo -> Base unit
*1000
Centi -> Milli
*10
Base unit -> Centi
*100
Milli -> Micro
*1000
Micro -> Nano
*1000
Nano -> Micro
/1000
Micro -> Milli
/1000
Milli -> Centi
/10
Centi -> Base unit
/100
1cm^3 = …
1mL
1m^3 = …
1kL
1t = …
1000kg
1ha = …
10,000 m^2
Area of a triangle?
1/2bh
Area of a circle?
Pi*r^2
Area of a trapezium?
(h/2)(a+b)
Circumference of a circle?
2pir
Kite?
1/2*diagonals
Area of a sector of a circle?
sector size*area of circle formula
Perimeter of a sector?
sector size*circumference formula + rest of given perimeter
Surface area of a cone?
Pir^2+Pir*l
What is “l” in terms of cones?
The “slant height” of the cone, e.g any point on the circumference of the base, up the curved surface and to the apex.
Volume of prisms and cylinders?
V=A*h
Volume of cones and pyramids?
V=1/3Ah
Surface area of sphere?
4Pir^2
Volume of sphere?
V=4/3Pir^3
how to transfer between km^2 -> m^2, etc.?
multiple or divide by the the number, (100, 1000 etc.) but add a ^2.
e.g km^2 -> m^2 = *1000^2
area of a paralellogram?
HEIGHT * base
a
area of a rhombus?
1/2*diagonals
