Mathematics Grade 1
Strand: GEOMETRY (1.G.) Standard 1.G.1
Mathematics Grade 1
Strand: GEOMETRY (1.G.) Standard 1.G.2
Students will analyze characteristics of geometric shapes.
Additional Resources
Students will analyze characteristics of geometric shapes. Students need to know the defining attributes (and other attributes that are consequences of the definitions) of a circle, square, triangle and rectangle prior to this lesson.
Polygon—A closed plane figure made by line segments
Circle—A closed curve with all its points in one plane and the same distance from a fixed point.
Triangle—A polygon with three sides (additional attributes: three angles/corners).
Square—A quadrilateral (four-sided polygon) with four congruent sides and four right angles.
Rectangle—A quadrilateral with two pair of congruent parallel sides and four right angles (additional attributes: two pair of parallel sides, two pair of congruent sides).Note: A rectangle does not necessarily have two short and two long sides! A square is a special rectangle!
Students need to experience the shapes by touching, seeing, and discussing the number of sides and/or corners of each with peers or the whole class. Students should be given many opportunities to find shapes in their environment. Last, using definitions from class, students find an object in their environment and communicate why it is like the shape of their choice and not like another shape.
5. Understand and use basic concepts and skills.
6. Communicate clearly in oral, artistic, written and nonverbal form.
Invitation to Learn
I Spy
Instructional Procedures
Listening Activity: Have children:
Critical Thinking Skills: Can you think of an object that has more than one shape?
Shape Riddles: Let your imagination go!
Family Connections