Hello Friends, in today's session we all are going to discuss about one of the most interesting and a bit complex topic of mathematics, geometry. In grade IX of every education board ,we get familiar with algebraic expressions of mathematics , but not so familiar with geometry . First of all, we discus what is geometry ? Basically geometry is a mathematical branch and in this branch we study about the designing of different shapes, calculation of their area like area of circle, depth, volumes, height, etc. In this session we learn how to measure geometrical figure , like square, rectangle etc. and introduction about composite figures . First of all we learn Measurements of geometric figures here measurement means finding distance , area and volume of geometric figures and so we divide measurement of geometrical figures in three units ,For more measurement related problems click here,
if there is two points P( x1 , y1 ) and Q(x2 ,y2) in a plane , then formula to measuring distance between these two points PQ is –
sqrt ((x2 – x1 )2 + ( y2 – y1 )2 )
here sqrt means square root
Next we proceed to discuss standard formulas to measuring area of geometrical figures :
1. Area of triangle = 1 * b * h
2
here b refers base length of triangle and h refers to height length of triangle
2. Area of square = a2
here a refers to one side of square
3. Area of rectangle = a* b
here a refers to length of rectangle and b refers to width of rectangle
4. Area of parallelogram = b * h
here b refers to one side length and h refers to width between two sides
5. Area of circle = pi * r2
here pi = 3.14 and r refers to radius of circle
6. Area of eclipse = pi * r1 * r2
here pi = 3.14 and r1 and r2 are two side radius of eclipse
Next we are going to discuss standard formula to measuring volume of geometrical figures –
1. Volume of cube = a3
here a refers to each side of cube
2. Volume of Cuboid = a * b * c
here a shows length , b shows width and c shows height
3. Volume of cylinder = pi * r2 * h
here pi = 3.14 , r refers to radius of cylinder and h refers to height of cylinder
4. Volume of pyramid = 1 * b * h
3
here b refers to width of pyramid and h refers to height of pyramid
5. Volume of sphere = 4 * pi * r2 * h
3
here pi = 3.14 , r refers to radius of sphere and h refers to height of sphere
This is all about standard measurement formula of geometrical figures .
Now , we proceed to our next topic - composite figures
We know that in geometry , there are some standard figures and combination of these standard figures make composite figures like -
This is a composite figure because it includes square and rectangle in one figure .
So, in this session we learn how to measure geometrical figure and we learn basic information about composite figures and to know about Arithmetic and geometric series and Basic constructions grade IX refer Internet.
- measuring distance
- measuring area of geometrical figures
- measuring volume of geometrical figures
if there is two points P( x1 , y1 ) and Q(x2 ,y2) in a plane , then formula to measuring distance between these two points PQ is –
sqrt ((x2 – x1 )2 + ( y2 – y1 )2 )
here sqrt means square root
Next we proceed to discuss standard formulas to measuring area of geometrical figures :
1. Area of triangle = 1 * b * h
2
here b refers base length of triangle and h refers to height length of triangle
2. Area of square = a2
here a refers to one side of square
3. Area of rectangle = a* b
here a refers to length of rectangle and b refers to width of rectangle
4. Area of parallelogram = b * h
here b refers to one side length and h refers to width between two sides
5. Area of circle = pi * r2
here pi = 3.14 and r refers to radius of circle
6. Area of eclipse = pi * r1 * r2
here pi = 3.14 and r1 and r2 are two side radius of eclipse
Next we are going to discuss standard formula to measuring volume of geometrical figures –
1. Volume of cube = a3
here a refers to each side of cube
2. Volume of Cuboid = a * b * c
here a shows length , b shows width and c shows height
3. Volume of cylinder = pi * r2 * h
here pi = 3.14 , r refers to radius of cylinder and h refers to height of cylinder
4. Volume of pyramid = 1 * b * h
3
here b refers to width of pyramid and h refers to height of pyramid
5. Volume of sphere = 4 * pi * r2 * h
3
here pi = 3.14 , r refers to radius of sphere and h refers to height of sphere
This is all about standard measurement formula of geometrical figures .
Now , we proceed to our next topic - composite figures
We know that in geometry , there are some standard figures and combination of these standard figures make composite figures like -
This is a composite figure because it includes square and rectangle in one figure .
So, in this session we learn how to measure geometrical figure and we learn basic information about composite figures and to know about Arithmetic and geometric series and Basic constructions grade IX refer Internet.
No comments:
Post a Comment