1.pptx
- 2. Parallel Lines Parallel linesrun alongside each other in pairs They would never meet if they carried on. They are always the same distance apart. An easy way to remember whether lines are parallel is Parallel has parallel l’s in.
- 3. Look at theseshapes. How many pairs of parallel lines can you see in each shape?
- 4. PerpendicuLar What angle isthis? PerpendicuLar lines are pairs of lines that meet at a right angle. They are usually marked by using the right-angle symbol at the point where they meet. An easy way to remember perpendicuLar lines is it ends with an r for right angle. It is in the shape of L
- 5. Two-dimensional Shapes (2D) • Theseshapes are flat and can only be drawn on paper. • They have two dimensions – length and width. • They are sometimes called plane shapes.
- 6. The way wedescribe a shape is by listing its ‘properties’ • NUMBER OF SIDES • For example, a pentagon has 5 sides. • NUMBER OF EDGES (VERTICES) A vertex is the same as a corner, it is where two sides meet. For example, a pentagon has 5 vertices. Properties of 2D shape
- 7. I am a CIRCLE Ihave 1 side. I have 0 vertices.
- 8. I am a triangle. Ihave 3 sides. I have 3 corners.
- 9. QUADRILATERALS We all have4 sides. We have only straight sides and no curved sides We are Closed shape Remember just like a quad bike.
- 11. I am Square.. I have4 sides. I have 4 corners. All my sides are equal Opposite sides are equal
- 12. I am a Rectangle. Ihave 4 sides. I have 4 corners. I have two short sides and two long sides. Opposite sides are equal
- 13. I am a Parallelogram. Ihave 4 sides. I have 4 corners. My opposite sides are equal My opposite angles are equal
- 14. I am a Kite. Ihave 4 sides. I have 4 corners. 2 pairs of equal length sides
- 15. I am a Rhombus. Ihave 4 sides. I have 4 corners. All my sides are equal Opposite angles are equal
- 16. Sides Quadrilateral Sides 1 pair ofparallel sides 2 pairs of parallel sides and opposite sides equal. 2 pairs of parallel sides and 4 perpendicular 2 pairs of parallel sides and 4 perpendicular. 2 pairs of parallel sides. No parallel or perpendicular
- 17. I’m pentagon I have 5 sides. Ihave 5 corners.
- 18. I’m Hexagon I have 6 sides. Ihave 6 corners.
- 19. I’m heptagon I have 7 sides. Ihave 7 corners.
- 20. I’m Octagon I have 8 sides. Ihave 8 corners.
- 21. Polygon Greek: Poly- "many“,-gon "angle" Regular = sides/angles all equal Which of these shapes are polygo Which are regular? Which are irregular? Can you name them? Irregular Octagon Irregular Hexagon Irregular Hexagon Regular Pentagon Regular Decagon 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. Regular Octagon Regular Triangle Regular Hexagon
- 22. Irregular Regular Irregular Regular Irregular Regular Irregular Regular Irregular Regular Is this shaperegular or irregular? Regular or Irregular Regular or Irregular Regular or Irregular Regular or Irregular Regular or Irregular Regular or Irregular Regular or Irregular Regular or Irregular Regular or Irregular Regular or Irregular
- 23.
- 24.
- 25.
- 26. Cube Cylinder Square-based pyramid Cuboid triangular- based pyramid Triangular- basedprism hexagonal- based prism Pentagonal- based prism Square face Circular face Square and triangular face Rectangle and square face Triangular face Triangle/ rectangle face Pentagon and square face Hexagon and square face
- 27. Faces, Edges andVertices Three dimensional (3D) shapes are defined by the number of faces, edges and vertices (corners) that they have. VERTEX (plural is vertices) EDGE TETRAHEDRON FACE
- 28. TETRAHEDRON A tetrahedron or triangular basedpyramid is a pyramid with triangular faces. Faces Edges Vertices 4 6 4 Faces, Edges and Vertices
- 29. A square basedpyramid Faces Edges Vertices 5 8 5 Faces, Edges and Vertices Three dimensional (3D) shapes are defined by the number of faces, edges and vertices (corners) that they have.
- 30. Find the numberof faces, edges and vertices for each of the 3D shapes shown below. Pentagonal based pyramid Faces Edges Vertices 6 10 6 Hexagonal based pyramid Faces Edges Vertices 7 12 7 Rectangular based pyramid Face= Base +1 Vertex= Base +1 Edge= Base x 2 Faces Edges Vertices 5 8 5
- 31. Find the numberof faces, edges and vertices for each of the 3D shapes shown below. Cube Hexagonal based prism Faces Edges Vertices 6 12 8 Faces Edges Vertices 8 18 12 Pentagonal based prism Faces Edges Vertices 7 15 10 Cuboid or rectangular based prism Faces Edges Vertices 6 12 8 Triangular based prism Faces Edges Vertices 5 9 6 Face= Base + 2 Vertex= Base x 2 Edge= Base x 3
- 32. What is perimeter? Perimeter isthe distance around a figure. When would someone need to find the perimeter of a figure?
- 33. Count the numberof sides around the rectangle 1 cm Perimeter - Distance around the outside of a shape 3 cm 2 cm 10 cm
- 34. 3 cm 2 cm 3cm 3 + 2 + 3 + 2 = 10 cm Add the sides together 2 cm
- 35. What is Area??? Areais the amount of surface that a figure covers. It is measured in square units When would someone need to find area?
- 36. Count the numberof squares 1 5 2 4 7 3 6 8 9 9 square units Area -space inside a shape.
- 37. Area= 3 cmx 3 cm It is made of 3 rows and 3 columns Multiplyrowsby column 9 squarecm 3 cm 3 cm
- 38. Find the areaand perimeter of this shape Area = 1 5 2 4 7 3 6 8 9 11 10 12 Perimeter = 12 Sq cm 16 cm 4 2 2 2 2 4 + + + + +
- 39.
- 40. add up allthe sides, Or count the sides of grids Use these two methods To find the perimeter count the space inside Or multiply two sides Use these two methods To find the area To the tune of Farmer in the Dell