Geometry Flashcards
These angles extend outward within a shape.
Exterior angles
How do we calculate the area of a rectangle?
Multiply it’s length and width
OR
Base x height
How do we calculate the area of a square?
x^2
Or multiply the given measurement by itself
What is the difference between the perimeter and an area?
Area is the entirety or the inside of a shape/surface
But the perimeter is the border line only
How do we get the perimeter of a square?
4(sides)
or multiply the length of a one side by 4
How do you calculate the area of a triangle?
1/2 base x height
How do we calculate the area of a trapezoid?
1/2 (base 1 + base 2) x height
What do you call the perimeter of a circle?
A circumference
What formula should we use to calculate the area of a circle?
πr^2
pie radius squared
How do we calculate the circumference of a circle?
2 π r
two x pie x radius
How do we calculate the curved surface of a cylinder?
2 π r h
r = radius
h = height
This triangle has no equal sides
Scalene Triangle
How do we calculate the total surface of a cylinder?
2 π r (r+h)
how do we calculate the volume of a cylinder?
π r^2 h
This triangle has an angle that falls under 90 degrees
Acute Triangle
What is the difference between an area and a volume?
Area is 2 dimensional
while, Volume is 3 dimensional
How do we calculate the curved surface area of a cone
π r l
l = length
r = radius
how do we calculate the total surface area of a cone?
including the extended formula
π r (r + l)
Extended formula:
π r [ r + √ (h^2 + r^2)]
This triangle consists of one perpendicular line or has a 90 degrees angle
Right Triangle
How do we calculate the volume of a cone?
1/3 • π r^2h
This triangle has one angle that extends above 90 degrees
Obtuse Triangle
How do we calculate the surface area of a sphere?
4 π r^2
How do we calculate the volume of a sphere?
4/3 x π r^3
How do we calculate the volume of square based pyramid?
1/3 A•h
A = area of the base
h = height of the pyramid
