Shapes and measurement Flashcards
a^2 + b^2 = c^2
Pythagoras theorem
Angle/ 360 X 2πr
Arc length
2πr
Circumference
Length X Width
Area of Rectangle
1/2 base X height
Area of triangle
a + b/2 X h
Area of trapezium
Base X height
Area of parallelogram
π r^2
Area of a circle
angle/360 X π r^2
Area of an arc
Area of uniform cross section X length
Volume of a prism
Area of all faces added together
Total surface area
2πr^2 + 2πrh
Surface area of a closed cylinder
πr^2 + 2πrh
Surface area of an open cylinder
2πrh
Surface area of a cylinder with both ends open
Base area X height/3
Volume of a pyramid
4πr^3/3
Volume of a sphere
πr^2 + πrs
Surface area of a cone
4πr^2
Surface area of a sphere
Side length of small triangle -> side length of large triangle
X enlargement scale factor
or
/ reduction scale factor
Side length of large triangle
