Bring creativity into math by letting your students draw cute animals out of triangles and quadrilaterals. Students will learn about properties of polygons as they analyze whether their pets have features that are parallel, perpendicular, regular, congruent, concave, and convex. They will identify symmetry, acute angles, right angles, obtuse angles, and vertices. The geometric shapes used in this activity are equilateral triangle, isosceles triangle, scalene triangle, right triangle, square, rectangle, rhombus, parallelogram, trapezoid, and quadrilateral.
Aligned to 4th Grade Common Core Standards
• 4.G.A.2 - Classify two-dimensional figures based on the presence or absence of parallel
or perpendicular lines, or the presence or absence of angles of a specified size.
Recognize right triangles as a category, and identify right triangles.
• 4.G.A.3 - Recognize a line of symmetry for a two-dimensional figure as a line across the
figure such that the figure can be folded along the line into matching parts. Identify
line-symmetric figures and draw lines of symmetry.
Aligned to 5th Grade Common Core Standards
• 5.G.B.3 - Understand that attributes belonging to a category of two-dimensional
figures also belong to all subcategories of that category. For example, all rectangles
have four right angles and squares are rectangles, so all squares have four right angles.
• 5.G.B.4 - Classify two-dimensional figures in a hierarchy based on properties.
Download an item with many more activities on classifying triangles and quadrilaterals, available for ★ 4th grade here
★ and for ★ 5th grade here
★. The Geo Pet activity described above is included.