Area of a square with side 21 units = side * side = 21 * 21 = 441 square units Perimeter of a square with side 21 units = 4 * side = 4 * 21 = 84 units Diagonal of a square with side 21 units = 2 Inradius (radius of incircle) of a square with side 21 units = side/2 = 0.5 * 21 = 10.5 units Circumradius (radius of circumcircle) of a square with side 21 units = side/2 Area of incircle of a square with side 21 units = PI * side Area of circumcircle of a square with side 21 units = PI * side Order of symmetry of a square is 4 (number of times the shape co-incides with itself during a 360 degree rotation) Number of axes of symmetry of a square is 4 - two diagonals and the other two lines cross horizontally and vertically through the middle of the square. To understand more about the geometric features and properties of squares, formulas related to mensuration etc. you might find it useful to read the properties of a Square tutorial over here. Many of these concepts are a part of the Grade 9 and 10 Mathematics syllabus of the UK GCSE curriculum, Common Core Standards in the US, ICSE/CBSE syllabus in India. You may check out our free and printable worksheets for Common Core and GCSE. Geometric Properties of a square of side 16 units. Geometric Properties of a square of side 17 units. Geometric Properties of a square of side 18 units. Geometric Properties of a square of side 19 units. Geometric Properties of a square of side 20 units. Geometric Properties of a square of side 21 units. Geometric Properties of a square of side 22 units. Geometric Properties of a square of side 23 units. Geometric Properties of a square of side 24 units. Geometric Properties of a square of side 25 units. Geometric Properties of a square of side 26 units. |