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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  ...

Because the sum of the angles of each triangle is 180 degrees... We get. quadrilaterals. So, the sum of the interior angles of a quadrilateral is 360 degrees .

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.montereyinstitute.org/courses/DevelopmentalMath/COURSE_TEXT2_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 ...

Apr 24, 2017 ... In order to solve many geometry problems, it's important to understand the basics of angle measurement and the rules that all polygons follow.

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.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.