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Clever Corner All grades
Primary 5

Area of triangles

Finding the base and height of a triangle, and the area of triangles and of figures made from them.

5 topics24 episodes10 min in all

Play from the start

Contents

  1. 1 Recall: squares and rectangles 3 episodes · 1 min

    A recap of the area of squares and rectangles, and of shapes made from them. Topic page ›

    1. 1.1 Areas of rectangles and squares 0:40
    2. 1.2 Two squares side by side 0:16
    3. 1.3 A staircase with ticked steps 0:31
  2. 2 Base and height of a triangle 3 episodes · 2 min

    Finding the height that goes with each base of a triangle, and drawing it. Topic page ›

    1. 2.1 Name the base or the height 0:33
    2. 2.2 Three bases and their three heights 0:32
    3. 2.3 Draw the height with a set square 0:31
  3. 3 Finding area of a triangle 2 episodes · 1 min

    The area of a triangle as half of base times height. Topic page ›

    1. 3.1 Triangles on a grid, count base and height 0:28
    2. 3.2 Triangles with a length that is not needed 0:44
  4. 4 Areas involving squares, rectangles and triangles 13 episodes · 5 min

    The area of figures made of triangles, squares and rectangles, by adding parts or taking parts away. Topic page ›

    1. 4.1 A triangle in a square 0:16
    2. 4.2 Half of a triangle 0:16
    3. 4.3 Area of a kite 0:22
    4. 4.4 A figure made of two triangles 0:17
    5. 4.5 A square tile of four triangles 0:17
    6. 4.6 Triangles on a grid, box and take away 0:25
    7. 4.7 A white triangle cut out of a rectangle 0:21
    8. 4.8 A white triangle cut out of a triangle 0:17
    9. 4.9 A six-sided figure with four equal sides 0:27
    10. 4.10 An arrowhead inside a triangle 0:18
    11. 4.11 A triangle in a rectangle of 90 cm² 0:27
    12. 4.12 Triangle KPR across two squares 0:26
    13. 4.13 A four-sided part across two squares 0:22
  5. 5 Thinking questions 3 episodes · 1 min

    Puzzles: a triangle built from paper pieces, a square made of four triangles, and two ways to one area. Topic page ›

    1. 5.1 Build a right-angled triangle from paper pieces 0:30
    2. 5.2 The side of a square made of four triangles 0:21
    3. 5.3 Two ways to the area of a thin triangle 0:24