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
how do we calculate the surface area of a square based pyramid
a^2 + 2al
a = side of the base
a^2 = area of the base
l = slant height
This type of triangle has two equal sides
Isosceles Triangle
What is this type of triangle where all it’s sides are equal?
Equilateral Triangle
Supplementary angles add up to?
180 degrees
These angles extend/falls inward inside the shape
Interior Angles
How do you calculate the sum of all interior angles of any polygon?
180 degrees • (n -2)
n = number of sides the polygon has
