Area of a shape - practice for 13 year olds - page 3 of 46
Number of problems found: 909
- Squaring the Circle
Find the side of the square with the same area as the circle of radius 18. - Isosceles triangle
Calculate the area of an isosceles triangle, the base measuring 16 cm and the arms 10 cm. - Right triangle
Right triangle ABC with side a = 19 and the area S = 95. Calculate the length of the remaining sides. - Circumference 47983
What is the area of an equilateral triangle with a circumference of 63 cm?
- Increase 4957
How does the area of a circle change if we double its radius? How many times does its area increase? - The length 14
The length of the rectangle is 6cm, and the perimeter of the rectangle is 20 cm. Find the rectangle's breadth. Find the area of the rectangle. - CZ flag
What percentage of the Czech flag comprises blue, white, and red textiles? - Square
Calculate the square's perimeter and area with a diagonal length of 30 cm. - Diameter
The diameter of a circular plot is 14 dm. Find the circumference and area.
- Annulus
Calculate the area of two circles annulus k1 (S, 3 cm) and k2 (S, 5 cm). - Circles
The area of a circle inscribed in a square is 14. What is the area of a circle circumscribed around a square? - Equilateral 37341
Calculate an equilateral triangle's perimeter and area with a side of 20 dm. - Illuminates 4961
The lamp illuminates a circle with a diameter of 10m. What area does the light illuminate? - Irrigates 4958
The water jet for welding the lawn reaches a distance of 1.8 m. How much is the lawn irrigated?
- Calculate 14733
Square has the side a = 12 cm. Calculate the area of a triangle in the square. - 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 6929
Two-thirds of the circumference of the circle is 12π cm long. Calculate the area of the circle.
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