Grade 1 • Mathematics • Geometry

Grade 1 Mathematics

Geometry

Geometry Vocabulary

  • Face: the flat surface of a solid figure
  • Side: a line segment joining two corners of a figure
  • Attributes: a characteristic such as shape or size
  • Angle: two rays that share an endpoint
  • Two-Dimensional: the outline of a shape such as a triangle, square, or rectangle
  • Three-Dimensional: a solid figure
  • Composite: made up of several different things
  • Half: 2 equal parts
  • Quarter: 4 equal parts
  • Circle: a closed round figure
  • Rectangle: a shape with four sides and four square corners
  • Square: a rectangle that has four equal sides
  • Triangle: a shape with three sides and three corners
  • Trapezoid: a four-sided shape with only two opposite sides that are parallel *
  • Cube: a solid with 6 faces all the same size
  • Rectangular Prism: a solid with two identical rectangular bases
  • Cone: a solid with one curved surface, one flat surface that comes to a point
  • Cylinder: a solid with one curved surface and two identical circle bases
  • Whole: all, everything, total amount
* Students do not need to know the definition of a trapezoid or the term "parallel." They should be able to identify a trapezoid and compare it with a rectangle. Rectangles have 4 square corners and trapezoids do not.

 

Geometry Activities 

  • Go on a shape hunt outside, ask your student to name the shapes of doors, windows, bicycle wheels, etc.  Ask how your child knows that the door is rectangle and not a square or triangle.
  • Ask your student to identify the shapes of various road signs while traveling in the car.
  • Talk with your student about the various shapes of items packaged in the grocery store.
  • Build with blocks. Discuss what shapes were used to create the structure.
  • While playing board games, discuss why a die can only have 6 numbers on it.
  • Create your own puzzle by taking a sheet of paper and drawing lines from one side to the other and cutting out the pieces.  Discuss the smaller shapes you made within the whole piece of paper.
  • Use a given number of popsicle sticks and try to make as many different closed shapes as you can.

 

Geometry Independent Practice

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