6th gr Area perimeter Flashcards
Formula for area of a rectangle
length times width A = lxw
Formula for area of a square
side times side A = s x s
Formula for area of a parallelogram
base times height A = b x h
Formula for area of a triangle
base times height divided by 2 A =b x h ÷ 2
How do you find the perimeter of any polygon?
add up all the sides
What does composite figure mean?
made up of more than 1 polygon
Why is the formula for a triangle base times height divided by 2?
because it is half of a rectangle or parallogram
How do you label area?
squared ft^2
For the triangle area formula, how do you know what numbers are the base and height?
they form a right angle or are perpendicular
IF you know the area of a square or rectangle and one side, what math do you use to work backwards to find other side?
the opposite of multiplying is dividing
If you know the perimeter of a rectangle and one side, what math do you use to work backwards to find the other side
the opposite of adding is subtracting