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# perimeter and area.pptx

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# perimeter and area.pptx

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### perimeter and area.pptx

1. 1.  Perimeter: The length of the boundary of a closed figure is called the perimeter of the plane figure. The units of perimeter are same as that of length, i.e., m, cm, mm, etc.
2. 2.  Area: The area is the region bounded by the shape of an object. The space covered by the figure or any two-dimensional geometric shape, in a plane, is the area of the shape. Area is measured in square units (m2, cm2, in2, etc.)
3. 3. Perimeter and Area of a Rectangle  A rectangle is a figure/shape with opposite sides equal and all angles equal to 90 degrees. The area of the rectangle is the space covered by it in an XY plane.  Perimeter of a Rectangle = 2(a+b)  Area of Rectangle = a × b where a and b are the length and width of the rectangle.
4. 4. Perimeter and Area of a Square  A Square is a figure/shape with all four sides equal and all angles equal to 90 degrees. The area of the square is the space occupied by the square in a 2D plane and its perimeter is the distance covered on the outer line.  Perimeter of a Square = 4a  Area of a Square = a2
5. 5.  Perimeter and Area of a Triangle  The triangle has three sides. Therefore, the perimeter of any given triangle, whether it is scalene, isosceles or equilateral, will be equal to the sum of the length of all three sides. And the area of any triangle is the space occupied by it in a plane.  Perimeter of a triangle = a + b +c , where a, b and c are the three different sides of the triangle.  Area of a triangle = 1/2 b × h; where b is the base and h is the height of the triangle.