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Notes On 2 D Shapes / Integers / Fraction

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Published in: Mathematics
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Basic formulas along with properties

Pratibha T / Dubai

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  1. QUADILATERALS: quadrilateral a four-sided polygon with four angles. There are many kinds of quadrilaterals. The five most common types are the parallelogram, the rectangle, the square, the trapezoid, and the rhombus. 1. RECTANGLE PROPERTIES 1. Two sides are equal 2. All angles are 90 degree. 3. Number of vertices: 4 4. Number of edges: 4 Area = Length (L) * breadth/width (B/W) Perimeter = 2(L+B/W) 2. SQUARE PROPERTIES 1. All sides are equal 2. All angles are 90 degree. 3. Number of vertices: 4 4. Number of edges: 4 Area = side*side
  2. Perimeter : 4*side 3. Parallelogram PROPERTIES 1. Two opposite sides are equal 2. Down side is called base( side in blue color is height). 3. Number of vertices: 4 4. Number of edges: 4 Area = base*height/altitude Perimeter = sum of all sides. 4. TRIANGLES By Side Types of Triangles Equilateral has three Isosceles Triangle has two equal sides has equal sides By Angle Acute tri-rgle has three angles e: has one angle has an81e > 90'
  3. Area = 1/2 * base*height Perimeter = sum of all side For right angle triangle To find sides use Pythagoras theorem. a 5. CIRCLES Formula Area A Circumference C 27tr Circle Dia meter d Radius r kea 2r
  4. 6. SEMICIRCLES AREA OF A SEMICIRCLE o A semicircle is just half of a circle. To find the area of a semicircle we just take half of the area of a circle. o So, the formula for the area of a semicircle is: Area = CIRUMFERENCE = ITr 1 2 2 O
  5. N/A

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