Area of shape - 7th grade (12y) - math problems
Number of problems found: 268
Plane shape has a maximum area 677 mm2. Calculate its perimeter if perimeter is the smallest possible.
- Circle area
Calculate the circle area with a radius of 1.2 m.
Land has a rectangular shape, its surface area is 1.45 hectares. Its width is 250 m. Determine the length of the land.
- Math heart
Stylized heart shape created from a square with side 5 cm and two semicircles over his sides. Calculate the content area and its circumference.
- Perimeter to area
Calculate the area of a circle with the perimeter 15 meters.
- Diameter to area
Find the area of a circle whose diameter is 26cm.
- Area to perimeter
Calculate circle circumference if its area is 254.34cm2
- The garden
The garden has the shape of an isosceles trapezoid whose bases are 64 m and 24 m long, the height is 25 m. On what area of the garden is it possible to grow vegetables if a fifth of the area is occupied by a cottage, lawn and path?
- In the
In the national park, the ratio of the wooded area to grassland is 4: 1. The total area is 385km2. What area is wooded?
Calculate the area of a circle whose radius is 5 dm.
- Octagon from rectangle
From tablecloth rectangular shape with dimensions of 4 dm and 8 dm we cuts down the corners in the shape of isosceles triangles. It thus formed an octagon with area 26 dm2. How many dm2 we cuts down?
- Area of ditch
How great content area will have a section of trapezoidal ditch with a width of 1.6 meters above and below 0.57 meters? The depth of the ditch is 2.08 meters.
parcel has a rectangular shape of a trapezoid with bases 12 m and 10 m and a height 8 m. On parcel was built object with a footprint an isosceles triangle shape with side 4 m and height three-quarters of a meter. What is the area of unbuild parcel?
- Area of rectangle
How many times will increase the area of the rectangle, if we increase twice the length and at the same time we decrease the width by the half?
Plot has a diamond shape, its side is 25.6 m long and the distance of the opposite sides is 22.2 meters. Calculate its acreage.
- Maximum area of rhombus
Calculate the interior angles at which equilateral rhombus has a maximum area.
- Perimeter of square
The square has a circumference 17cm. What is its area?
- Trapezium 2
Trapezium has an area of 24 square cms. How many different trapeziums can be formed ?
The diameter of a circular plot is 14 dm. Find the circumference and area.
- Garden exchange
The garden has the shape of a rectangular trapezoid, the bases of which have dimensions of 60 m and 30 m and a vertical arm of 40 m. The owner exchanged this garden for a parallelogram, the area of which is 7/9 of the area of a trapezoidal garden. What is
Examples of area of plane shapes. Examples for 7th grade (seventh).