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www.geom.uiuc.edu/~dwiggins/conj06.html

We have seen in the Triangle Sum Conjecture that the sum of the angles in any triangle is 180 degrees. The Quadrilateral Sum Conjecture tells us the sum of the  ...

www.reference.com/math/many-degrees-quadrilateral-3bdd32915227ae84

There are 360 degrees in a convex quadrilateral. A convex quadrilateral is made up of four sides and four corners, or angles. None of the angles bend inward ...

www.coolmath.com/reference/polygons-04-quadrilaterals

Properties of quadrilaterals, interior angles of quadrilaterals Polygons: Properties of ... So, the sum of the interior angles of a quadrilateral is 360 degrees.

www.aaamath.com/geo612x3.htm

Example: How many degrees are in the fourth angle of a quadrilateral whose other three angles are 80o and 110o and 95o? Answer: 360o - 80o - 110o - 95o  ...

www.quora.com/How-many-degrees-are-in-a-quadrilateral

If you mean the sum of the interior angles, 360. You can always divide a quadrilateral into two triangles, each of which has 180 degrees. Well ...

www.theproblemsite.com/reference/mathematics/geometry/quadrilaterals/the-basic-quadrilateral

But what we do know is that the sum of their interior angles is 180 degrees. ... is a "special" quadrilateral like a rectangle or a square, we don't know much about ...

www.mathsisfun.com/geometry/interior-angles-polygons.html

(A Quadrilateral has 4 straight sides). Let's try a square: interior angles square 90 90 90 90 90° + 90° + 90° + 90° = 360°. A Square adds up to 360°. Now tilt a ...

www.montereyinstitute.org/courses/DevelopmentalMath/TEXTGROUP-1-19_RESOURCE/U07_L2_T1_text_final.html

You could draw many quadrilaterals such as these and carefully measure the four angles. You would find that for every quadrilateral, the sum of the interior ...

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.