formulas need to know Flashcards
(19 cards)
rectangle?
rectangle = length X width
parallelogram?
parallelogram = base X height
triangle?
triangle = 1/2 base X height
trapezium?
trapezium = 1/2(a+b)height
cuboid?
cuboid = length X width X height
prism?
prism = area of cross section X length
cylinder?
πr(squared)height
pyramid?
pyramid = 1/3 X area of base X height
circumference?
circumference = π X diameter, c = πd
area of a circle?
π X radius squared, A = πr(squared)
speed?
speed = distance / time
density?
desity = mass / volume
Pressure?
pressure = force / area
Pythagoras thereom?
pythagorous thearom = for a right angled triangle, a(squared) +b(squared) = c(suqared)
Trigonometric rations
sin X = opp/hyp, cos X = adj/hyp, tan X = opp/adj
sine rule?
sine rule = a/sin A = b/sin B = c/sin C
cosine rule?
a(squared) = b(squared) + c(squared) - 2bc cos A
area of triangle?
area of a triangle = 1/2ab sin C
quadratic equation?
ax(squared) +bx+c = 0