Perimeter and Area
find the perimeter of a rectangle that has a length of 12 cm and a width of 7 cm.
perimeter of a rectangle = l+l+w+w
P = 12+12+7+7 = 38 cm
what is the formula for finding the volume of a cube?
25+25+15+15=80m
A farmer needs 80 m of fencing to go around the entire field.
find the perimeter of a square with length of 6mm.
6+6+6+6= 24 mm
a cube has a side length of 5 cm. what is the surface area?
area of one face = 5x5 = 25 cm^2
cube has 6 faces = 25cm^2 x 6
surface area = 150 cm^2
A swimming pool is 8 m long, 4 m wide, and 2 m deep. How much water can it hold in cubic meters?
8x4x2 = 64 m^3
A swimming pool can hold 64m^3 of water.
find the area of a triangle that has a base of 10 cm and a height of 6 cm.
area of triangle = base x height / 2
(10x6)/2 = 30 cm^2
a rectangular prism has a length of 8 cm, a width of 4 cm, and a height of 5 cm. what is the volume?
8x4x5 = 160 cm^3
A gift box is in the shape of a cube with a side length of 10 cm. If the box is completely wrapped, what is the total area of the wrapping paper used?
area of one side = 10x10 = 100cm^2
cube has 6 sides = 100cm^2 x 6
total area = 600cm^2
find the area of a parallelogram where the base is 14 mm and the height is 9 mm.
area of parallelogram = b x h
area = 14 x 9
area = 126 mm^2
A triangular prism has two triangular bases with an area of 12 cm² each. It also has three rectangular faces with areas of 30 cm², 24 cm², and 18 cm². What is the total surface area?
12+12+30+24+18 = 96 cm^2
Describe a real-life situation where calculating surface area is important and explain why.
answers may vary.
what is the formula for finding the area of a trapezoid
area of a trapezoid = (a+b)h / 2
A cube and a rectangular prism both have a volume of 64 cm³. Which one has the greater surface area?
cube
answers may vary