Measurement-Perimeter & Area Flashcards
Perimeter of square
P=4s
Perimeter of rectangle
P= 2l+2w
Perimeter of irregular polygon
P= sum of sides
Perimeter of triangle
P= sum of sides
Define polygon
Many sided shape
Define regular polygon
All sides are the same length
What is the name of a regular quadrilateral?
Square
What is the name of a regular triangle
Equilateral
Perimeter of equilateral
P= 3s
Define perimeter
Total distance around the outside of a 2D shape
How many centimeters in a metre
1m=100cm
How many meters in a kilometer
1km= 1000m
How many mm in a centimeter
1cm= 10mm
Pythagoras Theorem to find hypotenuse
c^2= a^2 + b^2
Pythagoras’ Theorem to find short side
a^2= c^2 - b^2
Area of square
A= s^2
Area of triangle
A= 1/2 bh
Area of rectangle
A=lw
Area of parallelogram
A=bh
Area of trapezium
A= 1/2(a+b)h
Area of circle
A=pi x r^2
What is the name for distance around a circle
Circumference
What are the 2 circumference formulas
C= 2pi x r OR C= pi D
Arc length
Arc= theta/360 x 2 pir
