Grades 3 4 5 6 7 8 Subjects MathGeometry Collection Math IRL Share to Google Classroom Preview Document Download Document Information Standards Modeling Meets MathStrike a Pose: Get Expressive with Triangles! Standards 3.MGSR Measurement, Geometry, and Spatial Reasoning3.MGSR.3 Extend geometric reasoning to attributes of polygons and/or polyhedrons3.MGSR.3.1 Describe and draw right, acute, obtuse, and straight angles. Identify these angle types in two-dimensional figures including triangles and quadrilaterals