standard_description: 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.
problem_activity: Problem 1
Draw a right scalene triangle.
Problem 2
Draw an acute isosceles triangle.
Problem 3
True or false: all triangles have at least 2 acute angles.


aligns: no