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A quadrilateral is a 4 sided closed shape, like a square or rectangle.
There's also a rhombus (tilty, squished square), diamond, parrallelogram, and many others.
As long as it has 4 sides and is closed, it's a quadrilateral.
Quad means 4.
Every quadrilateral has 4 angles inside, as well as 4 sides.
An easy example is a square, or rectangle. Pick up a textbook if you're having trouble visualizing, or draw a square on a piece of paper.
Squares (and rectangles) have four 90 degree angles.
4*90 = 360 degrees in a quadrilateral.
Side note: The sum of the angles in a triangle is 180 degrees.
What about shapes with 5 sides... 6 sides... or more? Do you think a 5-sided shape will have 360 degrees in angle sums? More or less?
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What is the sum of angles in a six sided shape?
The sum of all the exterior angles is 360 degrees. The sum of all the interior angles is 720 degrees.
What is the sum of the measures of the exterior angles of a polygon?
If you multiply 360 by the number of angles in the polygon and then subtract the sum of all the interior angles you will end up with the sum of all the exterior angles of the polygon.
What is the sum of all the angles in an octagon?
1080°
What do all the angles of a triangle add up to?
Sum of angles in a triangle is 180
What shape equals 360 degrees?
The exterior angles of polygons equal 360 degrees.
