Perimeter - practice for 13 year olds - page 2 of 20
Number of problems found: 395
- Equilateral 37341
Calculate an equilateral triangle's perimeter and area with a side of 20 dm. - Iso triangle
An isosceles triangle with a base of 8 cm. Its circumference is 28 cm. Calculate the height of the triangle. - Perimeter of circle
Calculate the circumference of a described circle to the triangle with sides 9,12,15 cm. - Rhombus 4
The circumference of the rhombus is 44 cm, and its height is 89 mm long. Calculate its area. - Triangle
Calculate the triangle's heights ABC if the triangle's sides are a=82, b=44, and c=53. - One-fifth 80438
By what percent does the area of a square increase if its perimeter increases by one-fifth? - Circumference 8395
The circle's circumference is 321 dm larger than the diameter of the circle. What is the average? - Circumference 7669
The rectangular field is 2a meters long and a-2 meters wide. Calculate the field circumference. - 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 - Rhombus
If we increase the rhombus side by 2.4 cm, its perimeter is 20 cm. How long was the side of the rhombus? - Parallelogram
Side a of a parallelogram is twice longer than side b. Its circumference is 78 dm. Calculate the length of the sides of a parallelogram. - 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 - a simple
What is the ratio of the circumference of any circle and its diameter? Write the result as a real number rounded to 2 decimal places. - 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? - Parallelogram 5662
One side of a parallelogram is 8 cm long, which is two-sevenths of its circumference. Calculate the length of the other side of the parallelogram. - Circumference 2598
Calculate the circumference and area of the parallelogram ABCD, if a = 72cm and v = 4.3cm b = 6cm
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