Area of rectangles and triangles
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Area of rectangles and triangles

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  • Give each student a rectangle with measurements on the side. Get them to fold along the diagonal and discuss how we made a rectangle into a triangle. Discuss how this works and see if we can come up with a rule. Write it on the white boards. Then see if we can write it as a algebraic formula.

Area of rectangles and triangles Area of rectangles and triangles Presentation Transcript

  • Entry Activity Look at the cards on your desk. In pairs discuss match thekey words to the definitions.
  • The space inside the shapeArea Remember: The grass inside a field The length around the outside of a shapePerimeter Remember: The fence around the field A four sided shape, two sets of parallel sides, two pairs ofRectangle sides that are the same length, all angles are 90˚ A four sided shape, all sides are the same length,Square all angles are 90˚, two pairs of parallel sides A shape with three sides, all the sides are straightTriangle This shows a measurement of areacm² A shape with only straight sidesPolygon Side by side and having the same distanceParallel continuously between them
  • • I will learn to calculate the area of squares and rectangles by counting squares Level 3• I will learn to calculate the area of squares and rectangles using lengths Level 4• I will learn to calculate the area of a triangle Level 5• Challenge Objective: I will learn to calculate the area of compound shapes Level 5+
  • I will learn to calculate the area of squaresand rectangles by counting squares Level 3
  • I will learn to calculate the area of squaresand rectangles by counting squares Level 3
  • • I will learn to calculate the area of squares and rectangles by counting squares Level 3• I will learn to calculate the area of squares and rectangles using lengths Level 4• I will learn to calculate the area of a triangle Level 5• Challenge Objective: I will learn to calculate the area of compound shapes Level 5+
  • I will learn to calculate the area of squares and rectangles using lengths Level 4 9 cm
  • I will learn to calculate the area of squares and rectangles using lengths Level 4 108cm² 9cm² 25cm² 24cm² 35cm² 9 cm 84cm² 49cm² 54cm² 81cm² 121cm² 147cm² 20cm² 22.75cm² 45cm² 0.25cm²
  • • I will learn to calculate the area of squares and rectangles by counting squares Level 3• I will learn to calculate the area of squares and rectangles using lengths Level 4• I will learn to calculate the area of a triangle Level 5• Challenge Objective: I will learn to calculate the area of compound shapes Level 5+
  • I will learn to calculate the area of a triangle Level 5
  • I will learn to calculate the area of a triangle Level 5
  • I will learn to calculate the area of a triangle Level 5
  • • I will learn to calculate the area of squares and rectangles by counting squares Level 3• I will learn to calculate the area of squares and rectangles using lengths Level 4• I will learn to calculate the area of a triangle Level 5• Challenge Objective: I will learn to calculate the area of compound shapes Level 5+
  • Challenge Objective: I will learn to calculate the area of compound shapes Level 5+ 10cm 2cm Rectangle A 4cm Rectangle B 3cm
  • Challenge Objective: I will learn to calculate the area of compound shapes Level 5+
  • Challenge Objective: I will learn to calculate the area of compound shapes Level 5+ 76cm² 19cm² 16cm² 36cm² 88cm² 48cm²
  • Challenge Objective: I will learn to calculate the area of compound shapes Level 5+
  • Challenge Objective: I will learn to calculate the area of compound shapes Level 5+ 64cm² 64cm² 35cm² 136cm²
  • Progress SheetI can calculate the area of squares and rectangles by counting squares Level 3I can calculate the area of squares and rectangles using lengths Level 4I can calculate the area of a triangle Level 5I can calculate the area of compound shapes Level 5+
  • Red QuestionCalculate the area of the shape below
  • Pink QuestionCalculate the area of the shape below
  • Salmon QuestionCalculate the area of the shape below
  • Purple QuestionCalculate the area of the shape below
  • Yellow QuestionCalculate the area of the shape below
  • Gold QuestionCalculate the area of the shape below
  • Mint QuestionCalculate the area of the shape below
  • Blue QuestionCalculate the area of the shape below
  • Green QuestionCalculate the area of the shape below
  • Answer of 16cm²Area of compound shapes
  • Answer of 76cm²Area of compound shapes
  • Answer of 19cm²Area of compound shapes
  • Answer of 48cm²Area of compound shapes
  • Answer of 36cm²Area of compound shapes
  • Answer of 88cm²Area of compound shapes
  • Answer of 64cm²Area of compound shapes
  • Answer of 35cm²Area of compound shapes
  • Answer of 136cm²Area of compound shapes