Question

chapter 11 maths class 8 formulas​

Answer 1

Area of a general quadrilateral = 1/2(h1+h2)d

Area of a rhombus = 1/2 × d1 × d2

Area of a trapezium = 1/2(a+b)h

Area of a parallelogram = bh

Area of a triangle = 1/2 × b × h

Total surface area of a cuboid = 2(lb+bh+lh)

Total surface area of a cube = 6a^2

Total surface area of a cylinder = 2πr(r+h)

Volume of a cuboid = lbh

Volume of a cube = a^3

Volume of a cylinder = πr^2h

Answer 2

Perimeter of Square=4×Side

Area of Square=S×S

Perimeter of Rectangle=2(Length+Breadth)

Area of Rectangle=L×B

Perimeter of Triangle=(A+B+C)

Area of Triangle=½×B×H

Perimeter of circle=πr²

Area of Circle=πr²

Perimeter of Parallelogram=2(b×h)

Area of Parallelogram=b×h

Area of Tropezium=½×(a+b) ×h

Area of Rhombus=½×(d¹+d²)

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