This math chapter workbook on "Properties of Triangles and 4-sided Figures," focuses on the fundamental properties, types, and classification of triangles and quadrilaterals. Students practice questions that challenge them about the sum of the interior angles of a triangle and 4-sided shapes such as squares, rectangles, rhombuses, parallelograms, and trapezoids. Students need to know that the sum of the interior angles for 4-sided figures is 360 degrees. Practice questions include identifying these shapes and their properties, understanding congruence and symmetry, and exploring perimeter and area calculations.