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# Geometrycal figures

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fomulas for finding area, perimeter and volume of geometrical figures

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### Geometrycal figures

1. 1. GEOMETRYCAL FIGURES
2. 2. 1.CIRCLES “Circles are the locus of points with equal distance from the fixed point”
3. 3. If the radiuse of a circle is ‘r’ then Area of a circle = ∏r2 Perimeter of a circle = 2Π r
4. 4. 2.TRIANGLES Triangles are the three sided closed polygon having 3 angles
5. 5. If the sides of a triangle is ‘a’ , ‘b’ , ‘c’ and the height is ‘h’ then The area of the triangle = 1/2 x base x height (1/2xbxh) The perimeter of the triangle = a +b + c
6. 6. 3.RECTANGLES Rectangles are the four sided polygon having 4 angles
7. 7. If the length and breadth is ‘a’ and ‘b’ respectively then The area of a rectangle = a x b The perimeter of rectangle = 2( a+b )
8. 8. 4. SQUARES Squares are the four sided polygon having 4 angles
9. 9. If the sides of a square is ‘a’ then The area of a square = a2 The perimeter of a square = 4a
10. 10. 5. SPHERE A 3-dimensional object shaped like a ball. Every point on the surface is the same distance from the center.
11. 11. If the radius of the sphere is ‘ r ’ then Surface Area of a sphere = 4 × π × r2 Volume of a sphere = (4/3) × π × r3
12. 12. 6. CYLINDERS • two identical flat ends that are circular or elliptical • and one curved side. It has the same cross-section from one end to the other
13. 13. Surface Area of a Cylinder h –height r-radius Surface Area = 2 × π × r × (r + h) Which is made up of: Surface Area of One End = π × r2 Surface Area of Side = 2 × π × r × h