Menstruation chapter easy tips
Answers
it was very easy but practice the construction one day before test
Answer:
Step-by-step explanation:
Here are Some important formulas which are used in mensuration .
Rectangle :
Area = lb
Perimeter = 2(l+b)
Square :
Area = a×a
Perimeter = 4a
Parallelogram
Area = l × b
Perimeter = 2 ( l + b )
Triangle :
Area =(1 / 2 ) .b . h or √ s ( s - a ) ( s - b ) ( s - c)…..... S = ( a + b + c ) / 2
Trapezium :
Area = 1/2h(a+b)
Perimeter = Sum of all sides
Rhombus :
Area = ( d1 × d2 ) / 2
Perimeter = 4a
Kite :
Area = d1×d2/2
Perimeter = 2 × Sum on non-adjacent sides
Circle :
Area = πr^2 or πd^2/4
Circumference = 2πr or πd
Area of sector of a circle = (θπr^2 )/360
Cube :
Volume: V = l^3
Lateral surface area = 4a^2
Surface Area: S = 6s^2
Cuboid
Volume : lbh
Total surface area = 2 (lb + bh + hl) or 6l2
Length of diagonal =√(l^2+b^2+h^2)
Right Circular Cylinder :
Volume = π r2 h
Lateral Surface Area (LSA or CSA) = 2π r h
Total Surface Area = TSA = 2 π r (r + h)
Volume of hollow cylinder = π r h(R2 – r2)
Right Circular cone :
Volume = 1/3 π r2h
Curved surface area: CSA= π r l
Total surface area = TSA = πr(r + l )
Sphere
Volume: V = 4/3 πr3
Surface Area: S = 4πr2
Hemisphere :
Volume = 2/3 π r3
Curved surface area(CSA) = 2 π r2
Total surface area = TSA = 3 π r2
Prism :
Volume = Base area x h
Lateral Surface area = perimeter of the base x h
Pyramid:
Volume of a right pyramid = (1/3) × area of the base × height.
Area of the lateral faces of a right pyramid = (1/2) × perimeter of the base x slant height.
Area of whole surface of a right pyramid = area of the lateral faces + area of the base.