maths mensuration Flashcards
kilometer, metre, centimeter, millimeter converaions
1km = 1000m 1m = 100 1m = 1000 mm 1cm = 10mm
Tonne, kilogram, gram conversions
1 tonne = 1000kg
1 kg = 1000g
Litre, centiliter, milliliter, cubic centimeter conversions
1 L =100cl or 1000ml
1cl = 10 ml
1 ml = 1cm³
Circumference of a circle =
pi x diamater
Arc length =
sector angle/360 x 2 pi r
sector area =
Sector angle/360 x pi r squared
Cylinder surface area
Curved: 2πrh
Total: 2πr(h + r)
Cylinder volume
πr²h
Cone surface area
curved = πrl Total = πr(l + r)
cone volume
1/3 πr²h
Sphere surface area
4πr²
Sphere volume
4/3 πr³
Pyramid surface area
base are + area of the shapes in the sides
Volume of pyramid
1/3 x base area x perpendicular height
Surface area of cubed
2(lb + bh + lh)
Volume of cuboid
l x b x h
Surface area of cube
6l ²
Cube volume
l³
Surface area of hemisphere
curved: 2πr²
Total: 3πr²
Volume of hemisphere
2/3 πr³
Volume of prism
area of cross section x length
Mass equation
mass = volume x density