Description: Students cut out statements about triangles (side and angle properties). Then they decide if the statement is sometimes true, never true or always true. Students then prove their decision by drawing a picture. This activity includes 18 statements.
Right triangles are equilateral triangles (never true).
Scalene triangles are right triangles (sometimes true).
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.
Classify two-dimensional figures in a hierarchy based on properties.