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In current eBook titled as "2D & 3D Geometry Formulas eBook", mathematical formulas on 2D and 3D Geometry topics are covered.

These mathematical formulas are very helpful to solve quantitative problems asked in Bank PO, SSC and other competitive exams.

Download the Formulas' eBook from - http://pdf-ebooks-for-free.blogspot.in/2015/03/2d-3d-geometry-formulas-ebook.html

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These mathematical formulas are very helpful to solve quantitative problems asked in Bank PO, SSC and other competitive exams.

Download the Formulas' eBook from - http://pdf-ebooks-for-free.blogspot.in/2015/03/2d-3d-geometry-formulas-ebook.html

- 1. 2D GEOMETRY FORMULAS SQUARE s = side Area: A = s2 Perimeter: P = 4s s s RECTANGLE l = length, w = width Area: A = lw Perimeter: P = 2l + 2w w l TRIANGLE b = base, h = height Area: A = 1 2 bh Perimeter: P = a + b + c h b a c EQUILATERAL TRIANGLE s = side Height: h = √ 3 2 s Area: A = √ 3 4 s2 h s s s PARALLELOGRAM b = base, h = height, a = side Area: A = bh Perimeter: P = 2a + 2b b h a TRAPEZOID a, b = bases; h = height; c, d = sides Area: A = 1 2 (a + b)h Perimeter: P = a + b + c + d b h a c d CIRCLE r = radius, d = diameter Diameter: d = 2r Area: A = πr2 Circumference: C = 2πr = πd r d SECTOR OF CIRCLE r = radius, θ = angle in radians Area: A = 1 2 θr2 Arc Length: s = θr r s θ ELLIPSE a = semimajor axis b = semiminor axis Area: A = πab a b Circumference: C ≈ π ? 3(a + b) − ? (a + 3b)(b + 3a) ? ANNULUS r = inner radius, R = outer radius Average Radius: ρ = 1 2 (r + R) Width: w = R − r Area: A = π(R2 − r2) or A = 2πρw r R REGULAR POLYGON s = side length, n = number of sides Circumradius: R = 1 2 s csc(π n ) Area: A = 1 4 ns2 cot(π n ) or A = 1 2 nR2 sin(2π n ) R s http://pdf-ebooks-for-free.blogspot.in/
- 2. 3D GEOMETRY FORMULAS CUBE s = side Volume: V = s3 Surface Area: S = 6s2 s s s RECTANGULAR SOLID l = length, w = width, h = height Volume: V = lwh Surface Area: S = 2lw + 2lh + 2wh l w h SPHERE r = radius Volume: V = 4 3 πr3 Surface Area: S = 4πr2 r RIGHT CIRCULAR CYLINDER r = radius, h = height Volume: V = πr2h Surface Area: S = 2πrh + 2πr2 r h TORUS r = tube radius, R = torus radius Volume: V = 2π2r2R Surface Area: S = 4π2rR R r GENERAL CONE OR PYRAMID A = area of base, h = height Volume: V = 1 3 Ah h A RIGHT CIRCULAR CONE r = radius, h = height Volume: V = 1 3 πr2h Surface Area: S = πr √ r2 + h2 + πr2 h r FRUSTUM OF A CONE r = top radius, R = base radius, h = height, s = slant height Volume: V = π 3 (r2 + rR + R2)h Surface Area: S = πs(R + r) + πr2 + πR2 s h R r SQUARE PYRAMID s = side, h = height Volume: V = 1 3 s2h Surface Area: S = s(s + √ s2 + 4h2) h s s REGULAR TETRAHEDRON s = side Volume: V = 1 12 √ 2s3 Surface Area: S = √ 3s2 s http://pdf-ebooks-for-free.blogspot.in/

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