Modual 8 Flashcards
What is the area of a parallelogram?
B x H
What is the area of a trapezium?
1/2 x ( a + b) x h
What is the radius of a circle?
The distance half way between the circle
What is the perimeter of a triangle?
side x base x side
What is the perimeter of a circle?
2 x {pie} x r
What is the perimeter of a square?
4 x side
What is the perimeter of a rectangle?
2 x (w x h)
What is the area of a square?
side{squared}
What is the area of a rectangle?
l x h
How do you work out the area of a compound shape?
- You split the shape up into smaller shapes
- Work out the area of those shapes
- Add them all together
How do you find the perimeter of a compound shape?
Add all the lengths of the shape together
What is the area of a circle?
{pie} x r{squared}
What is the circumference of a circle?
2 x {pie} x r
How do you find the area of a sector?
The angle inside the sector
——————————- x area of the full circle
360
What is the volume of a cuboid?
l x w x h
What is the volume of a cylinder, triangular prism and hexagonal prism?
face of shape x length
What is the volume of a sphere?
4
– x {pie} x r {cubed}
3
What is the area of a triangle?
1/2 x B x H
Rules that apply to the surface area of a shape?
- only apply to 3D shapes
- it’s the total area of a shape
- you have to add each individual shape in side of the 3D shape and than add them all together
What is the surface area of a sphere?
4 x {pie, squared}
What is the surface area of a cone?
({pie} x r x l) + ({pie} x r{squared)
What is the surface area of a cylinder?
(2 x {pie} x r x h) + (2 x {pie} x r{squared}
How are minor segments and major segments made?
when a chord divides a circle
Which is the bigger segment, the major segment or the minor segment?
Major segment
How is the major arch and the minor arch made?
when two radius cut the circle
What is the volume of a pyramid?
1
– x base area x h
3
What is the volume of a cone?
1
– x {pie} x {squared} x h
3
How do you find the volume of a frustum?
volume of big cone - volume small cone
1 1
– x {pie}r{squared}h - – x {pie}r{squared}h
3 3
Is the big cone of a frustum the pointy bit at the top or the base
the base because it will look bigger and have a bigger volume
