Perimeter - 6th grade (11y) - examples
Washing machine drum wash at 55 RPM. Washing machine motor pulley has diameter 6 cm. What must be the diameter of the drum machine pulley when the motor is at 333 RPM?
- Two squares
Two squares whose sides are in the ratio 5:2 have sum of its perimeters 73 cm. Calculate the sum of area this two squares.
- Quarter circular
The wire that is hooked around the perimeter of quarter-circular arc has length 3π+12. Determine the radius of circle arc.
- Mr. Zucchini
Mr. Zucchini had a rectangular garden whose perimeter is 28 meters. Content area of the garden filled just four square beds, whose dimensions in meters are expressed in whole numbers. Determine what size could have a garden. Find all the possibilities and
Three cubes are glued into prism, sum of the lengths of all its edges is 115 cm. What is the length of one edge of the original cube?
How big is area of circle if its circumference is 80.6 cm?
Equilateral triangle with side 40 cm has the same perimeter as an isosceles triangle with arm of 45 cm. Calculate the base x of an isosceles triangle.
- Square grid
Square grid consists of a square with sides of length 1 cm. Draw in it at least three different patterns such that each had a content of 6 cm2 and circumference 12 cm and that their sides is in square grid.
Find the length of each side of rhombus if the perimeter is 49 dm long.
Calculate the area and perimeter of a parallelogram whose two sides are long a=18 cm b=12 cm and height ha = 2 cm long.
How many steps of 76 cm circumvent square garden with area 1.8 ha?
- Do you solve this?
Determine area S of rectangle and length of its sides if its perimeter is 102 cm.
The garden has the square shape with circumference 124 m. Divide it into two rectangular gardens, one should circumference 10 meters more than the second. What size will have a gardens?
- Rhombus HP
Calculate area of the rhombus with height 24 dm and perimeter 12 dm.
- Isosceles triangle
Calculate the perimeter of isosceles triangle with arm length 26 cm and base length of 21 cm.
- Rhombus problem
Perimeter of the rhombus is 204 dm and it area is 2244 dm2. Calculate the height of the rhombus.
- Around the flowerbed
Around a rectangular flowerbed with dimensions 5.25 m and 3.5 m are to be planted roses equally spaced so that the roses found in every corner of the flowerbed and consumed them as little as possible. a) At what distance are planted roses? b) How many ros
Rectangular playground is fenced with 38 m long netting. Its width is 7 m. Calculate its length.
Calculate perimeter of the rectangle with sides a=2.4 m and b=1.9 m.
- Bricks wall
There are 5000 bricks. How high wall thickness of 20 cm around the area which has dimensions 20 m and 15 m can use these bricks to build? Brick dimensions are 30 cm, 20 cm and 10 cm.