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Pentagon - Wikipedia

en.wikipedia.org/wiki/Pentagon

In geometry, a pentagon is any five-sided polygon or 5-gon. The sum of the internal angles in a ..... This follows quickly from the knowledge that twice the sine of 18 degrees is the reciprocal gold...

Cool math .com - Polygons - Pentagons - properties, interior angles

www.coolmath.com/reference/polygons-05-pentagons

Properties of pentagons, interior angles of pentagons Polygons: Properties of Pentagons. ... So, the sum of the interior angles of a pentagon is 540 degrees.

Polygons - Polygon basics - In Depth - Math.com

www.math.com/school/subject3/lessons/S3U2L1DP.html

The word polygon is a combination of two Greek words: "poly" means many and ... We find that the sum of the interior angles of a quadrilateral is 360 degrees.

Sum of Interior Angles of a Polygon - Regents Exam Prep Center

www.regentsprep.org/regents/math/geometry/gg3/lpoly1.htm

The total number of degrees in all three triangles will be 3 times 180. ... Example 2: How many sides does a polygon have if the sum of its interior angles is 720°?

www.ask.com/youtube?q=How Many Degrees Are In A Pentagon&v=jvFKoOKkE5E
Oct 4, 2013 ... Subscribe Now: http://www.youtube.com/subscription_center?add_user= ehoweducation Watch More: http://www.youtube.com/ehoweducation ...

Pentagon - math word definition - Math Open Reference

www.mathopenref.com/pentagon.html

Definition of a pentagon. ... Try this Adjust the pentagon below by dragging any orange dot. ... Sum of interior angles, 540°, In general 180(n–2) degrees .

BBC - GCSE Bitesize: Angle properties of polygons

www.bbc.co.uk/schools/gcsebitesize/maths/geometry/polygonsrev4.shtml

The formula for calculating the sum of the interior angles of a regular polygon is: ( n - 2) ... For any polygon, count up how many triangles it can be split into.

The Sum of the Interior Angles in a Polygon - SoftSchools

www.softschools.com/math/geometry/topics/the_sum_of_the_interior_angles_in_a_polygon/

You may already know that triangles have 180° and quadrilaterals have 360°. However, do you know how many degrees are in a pentagon or a dodecagon?

Polygon Interior Angles - Math Open Reference

www.mathopenref.com/polygoninteriorangles.html

The interior angles of a polygon and the method for calculating their values. ... angles of a polygon is given by the formula: sum. = 180. (. n. −. 2. ) degrees. where

Geometry Sum Of Polygon Interior Angles - Math-Prof.com

www.math-prof.com/Geom/Geom_Ch_30.asp

The angles inside any triangle add up to 180 degrees. What about the angles inside a shape with four corners? How come the angles inside a triangle add up to ...

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How many degrees are in a pentagon? | Reference.com

www.reference.com

The interior of a pentagon has five angles totaling 540 degrees. In a regular pentagon – a polygon with five congruent sides and five congruent angles – each  ...

The Math Dude : Polygon Puzzle: How Many Degrees Are in a ...

www.quickanddirtytips.com

Jan 9, 2015 ... How many degrees are in the interior angles of a pentagon? A hexagon? An octagon? Or any polygon? Keep on reading The Math Dude to ...

Interior Angles of Polygons - Math is Fun

www.mathsisfun.com

The Interior Angles of a Quadrilateral add up to 360°. Because there are 2 triangles in a square ... interior angles 90 (45,45) 90 (45,45). The interior angles in a ...