Grade 6 - Shape and Space
Standard 6.SS.2 - Use the fact that the angle sum of triangles is 180º and quadrilaterals is 360º to find the missing interior angle.
Included Skills: Geometry
Demonstrate that the sum of interior angles is: • 180° in a triangle • 360° in a quadrilateral. • Achievement Indicators - Explain, using models, that the sum of the interior angles of a triangle is the same for all triangles. - Explain, using models, that the sum of the interior angles of a quadrilateral is the same for all quadrilaterals.