Slide 1 / 242 Slide 2 / 242 1st Grade Geometry 2015-11-30 www.njctl.org Slide 3 / 242 Slide 4 / 242 Table of Contents Click to Standards for Mathematical Practices 2 Dimensional Shapes go to topic Sides and Corners MP 1 Make sense of problems and persevere in solving them. Open and Closed Shapes Lab: I Can Find a Shape Like That MP 2 Reason abstractly and quantitatively. Sorting by Attributes MP 3 Construct viable arguments and critique the reasoning of others. Lab: Shape Fun Composite Shapes MP 4 Model with mathematics. Orientation MP 5 Use appropriate tools strategically. Faces and Corners Rectangular Prisms & Cubes MP 6 Attend to precision. Lab: Building Shapes Cones, Cylinders & Spheres MP 7 Look for and make use of structure. Review of 3-D Shapes MP 8 Look for and express regularity in repeated reasoning. Introduction to Fractions Halves Click on each standard to bring Fourths you to an example of how to meet Review of Fractions this standard within the unit. Slide 5 / 242 Slide 6 / 242 2D Shapes A 2D shape is flat and has 2 dimensions (height & width). All of the shapes below are 2D shapes. 2 Dimensional Shapes Click to return to Click here for a song about shapes. Table of Contents
Slide 7 / 242 Slide 8 / 242 2D Shapes 2D Shapes I am a circle. I am round and I have no sides or edges. My center point is the same distance as any point on I am a rectangle. I have four straight sides and the outer curve. four right corners. My opposite sides are always equal. What objects can you find in our classroom that are shaped like a rectangle? What objects can you find in our classroom that are shaped like a circle? Slide 9 / 242 Slide 10 / 242 2D Shapes 2D Shapes I am a special type of rectangle. I am called a square. Are both of these shapes rectangles? I have 4 equal sides and four corners. What objects can you find in our classroom that are shaped like a square? Slide 11 / 242 Slide 12 / 242 2D Shapes 2D Shapes I am a triangle. I have three straight sides and three corners. I am a hexagon. I have six straight sides and six corners. What objects can you find in our classroom What objects can you find in our classroom that are shaped like a triangle? that are shaped like a hexagon?
Slide 13 / 242 Slide 14 / 242 2D Shapes 2D Shapes I am a trapezoid. I have 4 sides and 4 corners. What other flat (2D) shapes do you know? The top is shorter than the bottom. What objects can you find in our classroom that are shaped like a trapezoid? Slide 15 / 242 Slide 16 / 242 2D Shapes Shape Pictures Cross out all the circles. Circle all of squares. Color the triangles red. Color the trapezoids blue. Color the rectangles green. Color the hexagons black. Slide 17 / 242 Slide 18 / 242 Hidden Shapes 1 Is this shape a square? Yes No Click here for a fun game that has the children search pictures for hidden shapes.
Slide 19 / 242 Slide 20 / 242 2 Is this shape a triangle? 3 What is the name of this shape? square A Yes B rectangle No trapezoid C Slide 21 / 242 Slide 22 / 242 4 What is the name of this shape? 5 How many circles do you see? A circle B triangle C trapezoid Slide 23 / 242 Slide 24 / 242
Slide 25 / 242 Slide 26 / 242 Sides A side is one of the lines that make a shape. Sides and Corners Click to return to Table of Contents Slide 27 / 242 Slide 28 / 242 Sides Sides How many sides does each shape have? Can you count the sides? Trapezoid Pentagon Rhombus Triangle Slide 29 / 242 Slide 30 / 242 Sides Sides A shape can have curved or straight lines How many sides? Curved Square Hexagon Straight
Slide 31 / 242 Slide 32 / 242 Sides Sides Circle the shapes with straight sides. Put an X on the shapes with curved sides. Slide 33 / 242 Slide 34 / 242 Corners Corners A corner is the point where two sides meet. It can also be called a vertex. How many corners does each shape have? Pentagon Rhombus Slide 35 / 242 Slide 36 / 242 Corners Corners Count the vertices. How many corners? Trapezoid Square Triangle Hexagon
Slide 37 / 242 Slide 38 / 242 Name The Shape Name The Shape I am made with straight lines. I am made with straight lines. I have three sides. I have 4 corners. I have three vertices. I have 4 sides. What am I? All my sides are equal. What am I? ? ? Square triangle Slide 39 / 242 Slide 40 / 242 Name The Shape Name The Shape I am made with straight lines. I am made with curved lines. I have 4 sides and 4 vertices. I do not have corners or sides. I have 2 long sides and 2 short sides. I am round. What am I? What am I? ? ? Circle rectangle Slide 41 / 242 Slide 42 / 242 Name The Shape Class Discussion I am made with straight lines. I have 6 sides and 6 corners. What am I? What is similar about the sides of a trapezoid and a rhombus? ? HEXAGON
Slide 43 / 242 Slide 44 / 242 6 How many sides does a square have? 7 Does a circle have curved or straight sides? A Curved B Straight Slide 45 / 242 Slide 46 / 242 8 Does a rectangle have 3 corners? 9 How many corners does a trapezoid have? Yes No Slide 47 / 242 Slide 48 / 242 10 How many sides does a triangle have? A 2 B 3 C 4
Slide 49 / 242 Slide 50 / 242 Open and Closed Shapes Click to return to Table of Contents Slide 51 / 242 Slide 52 / 242 Open or Closed Open or Closed Open and closed shapes can have both curved and straight sides. 2D shapes can be open or closed. If a shape is open, two or more of the sides do not meet. If a shape is closed, all of the sides meet. Open Closed Slide 53 / 242 Slide 54 / 242 Open or Closed Open Draw an open shape with 3 straight sides. Is this shape open or closed? Explain why. How could we make it closed?
Slide 55 / 242 Slide 56 / 242 Closed Closed Draw a closed shape with 6 sides. Draw a closed shape with curved sides. Slide 57 / 242 Slide 58 / 242 Open or Closed 11 This shape is closed. Put a red X on the open shapes. Put a green O around the closed shapes. True False Slide 59 / 242 Slide 60 / 242 12 Karen said this shape is open. Is she 13 Sue saw an open shape while correct? driving in the car. Which shape did she see? Yes No A B C
Slide 61 / 242 Slide 62 / 242 14 Which two shapes are closed? 15 Is this shape open? A Yes No B C D Quiz Slide 63 / 242 Slide 64 / 242 Lab: I Can Find a Shape Like That This active game allows young learners to explore their environment and to discover that shapes that are all around them. Click here for complete directions Slide 65 / 242 Slide 66 / 242 Sorting by Attributes Click to return to Table of Contents
Slide 67 / 242 Slide 68 / 242 Sorting Sorting by Size Sorting means putting things into groups that have similar characteristics. These characteristics are called attributes. You can sort by different rules: Large Small size shape color Slide 69 / 242 Slide 70 / 242 Sorting by Shape Sorting by Color Red Blue Circle Square Triangle Rectangle Yellow Slide 71 / 242 Slide 72 / 242 Sort the shapes by their size Sort the shapes by their shape
Slide 73 / 242 Slide 74 / 242 Sorting Sorting Patterns We can make patterns using different attributes. Is there any other way to sort the shapes? Color pattern: Shape pattern: Size pattern: Slide 75 / 242 Slide 76 / 242 17 These shapes are shorted by 16 John sorted his blocks. Jimmy told him he which attribute? liked how he sorted them by their color. Is A color Jimmy correct? B shape Yes C size No Slide 77 / 242 Slide 78 / 242 18 Kim sorted her blocks. Which attribute 19 These shapes are shorted by which did she sort by? attribute? A color A color B shape B shape C size C size
Slide 79 / 242 Slide 80 / 242 Lab: Shape Fun 20 This pattern follows which attribute? A color B shape Have you ever seen randomly shaped pieces of wood and wondered how they could be used? Well, young C size children find geometry an exciting topic. Even with random pieces, there are many ways to investigate and discover geometric shapes. Click here for complete directions. Quiz Slide 81 / 242 Slide 82 / 242 Slide 83 / 242 Slide 84 / 242 Composite Shapes You can use shapes to build new shapes. Composite Shapes Which small shape do you see? What is the larger shape? Click to return to Table of Contents
Slide 85 / 242 Slide 86 / 242 Composite Shapes Composite Shapes Use your pattern blocks to arrange trapezoids Use your pattern blocks to arrange three triangles to make a hexagon. to make a trapezoid. How many trapezoids did you use? Slide 87 / 242 Slide 88 / 242 Composite Shapes Composite Shapes Use your pattern blocks to arrange rhombuses to Use your pattern blocks to arrange triangles to make a hexagon. make a rhombus. How many rhombuses did you use? How many triangles did you use? Slide 89 / 242 Slide 90 / 242 Composite Shapes Composite Shapes Use your pattern blocks to arrange triangles to Use the shapes at the bottom to create the make a hexagon. new shape. How many triangles did you use?
Slide 91 / 242 Slide 92 / 242 Composite Shapes Composite Shapes Use the shapes at the bottom to create the new shape. Use the shapes at the bottom to create the new shape. Slide 93 / 242 Slide 94 / 242 Composite Shapes Composite Shapes Use the shapes at the bottom to create the new shape. Use the shapes at the bottom to create the new shape. Slide 95 / 242 Slide 96 / 242 21 Can you make a rhombus with two 22 There are three triangles in this trapezoid. triangles? Yes True No False
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