Grade 8 - Geometry and Spatial Sense
Standard 8.GSS.1 - Use the fact that the angle sum of triangles is 180º and quadrilaterals is 360º to find the missing interior angle.
Included Skills: Geometry
Geometric Properties • sort and classify quadrilaterals by geometric properties, including those based on diagonals, through investigation using a variety of tools (e.g., concrete materials, dynamic geometry software) (Sample problem: Which quadrilaterals have diagonals that bisect each other perpendicularly?); • construct a circle, given its centre and radius, or its centre and a point on the circle, or three points on the circle; • investigate and describe applications of geometric properties (e.g., properties of triangles, quadrilaterals, and circles) in the real world.