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everythingRF RF Engineering Resources Database - RF Cafe

Geometry Formulas for Polygons

Right Triangle

Right triangle - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe  (Pythagorean)

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Equilateral Triangle

Equilateral triangle - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Rectangle

Rectangle - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe

Parallelogram

Parallelogram - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

General Quadrilateral

General quadrilateral - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe

    Geometry Formula - RF Cafe

Geometry Formula - RF Cafe  (Bretschneider's Formula)

Geometry Formula - RF Cafe

Cyclic-Inscriptable Quadrilateral

Cyclic inscriptable quadrilateral - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

General Triangle

General triangle - RF CafeGeometry Formula - RF Cafe

hc = length of altitude on side c,

tc = length of bisector of angle C,

mc = length of median to side c.

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe (Law of Cosines)

Geometry Formula - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe (Heron's formula)

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

The following symbols are used in these polygon formulas:

    K = area

    r= radius of inscribed circle

    R = radius of circumscribed circle

    p and q are diagonals

    n= number of sides

    θ = one of the vertex angles

 Source: CRC Standard Math Tables, 1987

Rhombus

Rhombus - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe

Trapezoid

Trapezoid - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe 

Regular Polygon

Regular polygon - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

    Geometry Formula - RF Cafe

   Geometry Formula - RF Cafe

Geometry Formula - RF Cafe 

Cyclic Quadrilateral

Cyclic quadrilateral - RF CafeGeometry Formula - RF Cafe

Geometry Formula - RF Cafe   (Brahmagupta's formula)

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe

Geometry Formula - RF Cafe 
everythingRF RF Engineering Resources Database - RF Cafe

About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2025
Webmaster: Kirt Blattenberger,
   BSEE - KB3UON - AMA92498
   USAF Radar Technician

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a lady's voice announced "You've Got Mail" when a new message arrived...

Copyright  1996 - 2026

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website: AirplanesAndRockets.com

My Daughter's Website: EquineKingdom