Formulas
What is the formula to find area of a rectangle?
A = lw
What is the area of a triangle with a base of 3 in. and a height of 4 in.?
6 in2
What is the area of a rectangle with a length of 4 cm. and width of 5 cm.?
20 cm2
What is the area of a square with a side length of 5 m?
25 m2
What is 3.5 x 1.23?
4.305
What is the formula to find the area of square?
A = lw or A = s2
The height must be __________ to the base.(Must use vocab term)
perpendicular
There are 2 pairs of ___________ lines in all rectangles.(Must use vocab term)
parallel
All four sides of a square are _____________. (Must use vocab term)
Congruent
What does perpendicular mean?
two lines that intersect to form right angles
What is one of the formulas to find area of a triangle?
A = 1/2bh or A =(0.5)bh or A = bh/2
If a triangle has side lengths of 4m, 3.2m, and 8m..what is the perimeter?
15.2m
What is the perimeter of a rectangle with a length of 4.8m and a width of 1.3m?
12.2m
What is the perimeter of a square with a side length of 2.5cm?
10cm
How do you always label area?
units squared
How do you find perimeter of any shape?
Add up all the side lengths
What is the area of a triangle with a base of 4.9m and a height of 3m?
7.35m2
What is the area of a rectangle with a length of 5.92cm and a width of 3.5cm?
20.72cm
What is the area of a square with a side length of 4.7ft?
22.09ft2
When you multiply 3.12 x 1.4, explain where the decimal point needs to go in the product of 4368
4.368 because there are 3 total digits after the decimal points in the factors
What is the formula to find area of a circle?
A = pi x r2
What is the height of a triangle if the area is 7.5m2 and the base is 5m.
Height = 3m
width = 4cm
If a square has an area of 49m2, what is the side length?
Side length = 7m
Explain why 5 x 1/2 is equivalent to 5 divided by 2?
Because if you KCF 5 divided by 2, you get 5 x 1/2