The sum of angles in a quadrangle is 360 degrees. Divide the quadrangle into two triangles which each have an angle sum of 180 degrees. 180 + 180 = 360

My fourth grader just learned. Draw an arc in each corner of the quadrangle. Tear off each corner so you can still see your arc. Place torn pieces together to form a circle.

Add 18454

Try to use the following:

1. Apply the theorems.

2. Use a sun dial.

1. Apply the theorems.

2. Use a sun dial.

The answer is always 360 degrees.

360 degrees

All you have to do is get a regular ruler and measure all the sides and the add them up