ABOUT ME Manish Pandey Electrical Engineer . Work as Educator at Unacademy Follow me on unacademy https://unacademy.com/user/buntymanish07 If you like the lesson review and rate it and drop any query regarding the related course I'll answer that definitely.
Mensuration -20 Area is the amount of 2-D space taken by an object. . The length of border around any 2-D object is called perimeter. . In this course we will learn about area of different 2-D shapes. .Questions are often asked from this topic.
Quadrilateral .Parallelogram |Area = Base height = b h 2 Perimeter = 2(a b) .Rhombus 2. Perimeter = 4a Rectangle 1, Area = 1 b 2. Perimeter = 2(1 + b) * Square 1. Area = a2 2. Perimeter = 4a . Trapezium Area-asum of parallel sides height =-(a + b) h
Triangle Heron's formula Area = Vs(s-a) (s-b) (s-c) where, s = a+b+c Area of right angled triangle 1 Area = base height =- b h 2
Circle Area of circle A = 2 Area of sector A =- . Tr2 360 Circumference of circle C = 2 r Circumference of sector C- 2 360
Points to Remember When problems related related to fencing or making boundary are considered, then rate is multiplied by perimeter . When problems related grazing, tiling and painting are considered area is multiplied by the given rate.
I am an engineer, educator at unacademy, aspire to be a government officer. Love to play badminton , watch football ,cook and eat.