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Mathematics LibreTexts

13.3: Geometric Formulas

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Table C1 - 2 Dimensions

Name Shape Formulas
Rectangle CNX_BMath_Figure_AppD_001.jpg

Perimeter: P = 2l+2w

Area: A = lw

Square CNX_BMath_Figure_AppD_002.jpg

Perimeter: P = 4s

Area: A = s2

Triangle CNX_BMath_Figure_AppD_003.jpg

Perimeter: P = a + b + c

Area: A = 12bh

Sum of Angles: A + B + C = 180°

Right Triangle CNX_BMath_Figure_AppD_004.jpg

Pythagorean Theorem: a2 + b2 = c2

Area: A = 12ab

Circle CNX_BMath_Figure_AppD_005.jpg

Circumference: C = 2πr or C = πd

Area: A = πr2

Parallelogram CNX_BMath_Figure_AppD_006.jpg

Perimeter: P = 2a + 2b

Area: A = bh

Trapezoid CNX_BMath_Figure_AppD_007.jpg

Perimeter: P = a + b + c + B

Area: A = 12(B + b)h

Table C2 - 3 Dimensions

Name Shape Formulas
Rectangular Solid CNX_BMath_Figure_AppD_008.jpg

Volume: V = lwh

Surface Area: SA = 2lw+2wh+2hl

Cube CNX_BMath_Figure_AppD_009.jpg

Volume: V = s3

Surface Area: SA = 6s2

Cone CNX_BMath_Figure_AppD_010.jpg

Volume: V = 13πr2h

Surface Area: SA = πr2+πrh2+r2

Sphere CNX_BMath_Figure_AppD_011.jpg

Volume: V = 43πr3

Surface Area: SA = 4πr2

Right Circular Cylinder CNX_BMath_Figure_AppD_012.jpg

Volume: V = πr2h

Surface Area: SA = 2πr2+2πrh

Contributors and Attributions


13.3: Geometric Formulas is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.

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