The Danish flag 0 Overview Using this Resource Connecting to the Curriculum Marking Student Responses Working with Students Further Resources This task is about working out the lengths and areas of parts of a flag. This is a drawing of the Danish flag, which has a white cross on a red background. [NOT DRAWN TO SCALE] Question 2Change answer a) What is the total width of the flag? cm Question 2Change answer b) What is the length of each rectangle on the right? cm Question 2Change answer c) What is the area of each rectangle on the right? cm^{2} Question 2Change answer d) What is the area of each square on the left? cm^{2} Question 2Change answer e) What is the area of the whole flag? cm^{2} Question 2Change answer f) What is the area of the white cross? cm^{2} Task administration: This task can be completed with pencil and paper or online (with auto marking displayed to students). Level: 4 Curriculum info: Maths, Geometry and Measurement, Measurement Keywords: length, area, composite shapes, rectangles, squares Description of task: Students calculate length and area of colours on the Danish flag. Curriculum Links: This resource can help to identify students' understanding of calculating length and area. Learning Progression FrameworksThis resource can provide evidence of learning associated with Measurement sense, sets 6-7 within the Mathematics Learning Progressions Frameworks.Read more about the Learning Progressions Frameworks. Answers/responses: Y8 (10/1997) a) 45 cm [20 + 5 + 20] very easy b) 40 cm [65 - 25] easy c) 800 cm^{2} [40 × 20] moderate d) 400 cm^{2} [20 × 20] moderate e) 2925 cm^{2} [45 × 65] moderate f) 525 cm^{2} [5 × 65 + 5 × 45 - 5 × 5] difficult Diagnostic and formative information: Student response Likely calculation Likely reason c) d) e) 120 180 220 Confuses perimeter and area. f) 550 5 × 65 + 5 × 45 Includes part of white cross twice. Finding area and perimeter Measuring the extension How big is the community hall? Area of the section II