Perimeter - practice for 12 year olds - page 3 of 17
Number of problems found: 326
- Circumference 6929
Two-thirds of the circumference of the circle is 12π cm long. Calculate the area of the circle. - The ratio
The ratio of the lengths of the two circles is 5:2. Find the ratio of a a) the radii of these circles b) the areas for these circles - Rectangle 45
The perimeter of a rectangle is 60cm if the length of the rectangle is 20cm. a)find the width b)find the area. - Rhombus
If we increase the rhombus side by 2.4 cm, its perimeter is 20 cm. How long was the side of the rhombus?
- Circle - simple
The circumference of a circle is 683 mm. How long in mm is its diameter? - 6-gon
The perimeter of a regular hexagon is 113. Calculate its circumradius (radius of a circumscribed circle). - OPT
What is the perimeter of a right triangle with the legs 14 cm and 21 cm long? - Radius
Determine the circle's radius if its perimeter and area are the same numbers. - Circumference 61704
Calculate the area of a circle if its circumference is 21.98 dm. Express the result in square decimetres.
- Circumference 61654
The diamond has an area of 21.6 cm square. Its height is 4 cm. What is the circumference of the diamond? - Describe 5845
The tower clock has a small hand 1 m long. What path will the tip of the little hand describe in 1 day? - Width and length
A rectangle's length is three times more than twice its width. Suppose the perimeter of the rectangle is 60 feet. What is the length of the rectangle? - Clock hands
The second hand has a length of 1.5 cm. How long does the endpoint of this hand travel in one day? - Circumference 48533
The diameter of the circle is 6.8 cm. Calculate the area of the circle to 1 decimal place. Calculate the circumference of the circle to 1 decimal place.
- Parallelogram 4701
Calculate the area and perimeter of the ABCD parallelogram with side a = 2.7 m, va = 0.8 m, b = 1.9 m. - Perimeter 3573
The carousel wheel has a diameter of 138 meters and has 20 cabins around the perimeter. What circuit does the bike have? - Calculate 3292
The perimeter of the isosceles triangle is 32 cm. The base is 2 cm longer than the shoulder. Calculate the sides of the triangle. - Rhombus HP
Calculate the area of the rhombus with height 75 cm and perimeter 16 cm. - Length of the arc
What is the arc length of a circle k (S, r=68mm), which belongs to a central angle of 78°?
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