ACT MATH · Plane Geometry · Foundations
Plane Geometry: What is the sum of interior angles of a quadrilateral?
Polygons, Pythagorean theorem, circles.
Try the problem
What is the sum of interior angles of a quadrilateral?
Hint and answer
Concept to use
Square area $s^2$.
Hint
Split it into two triangles.
Answer
360°
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