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Scales & Drawing

Scales & Drawing. Enlarge & Reduce Shapes. Scale Drawing to find Length. www.mathsrevision.com. Starter Questions. www.mathsrevision.com. Scales & Drawing. Enlargement & Reduction. Learning Intention. Success Criteria. To be able to enlarge or reduce a shape by a given scale factor.

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Scales & Drawing

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  1. Scales & Drawing Enlarge & Reduce Shapes Scale Drawing to find Length www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  2. Starter Questions www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  3. Scales & Drawing Enlargement & Reduction Learning Intention Success Criteria • To be able to enlarge or reduce a shape by a given scale factor. • 1. We are learning mathematically to enlarge or reduce various shapes. www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  4. Enlarge this shape by a factor of 2. Enlargement 1 → 2 2 → 4 1 cm 2 cm 2 cm 4 cm

  5. Reduce this shape by a factor of a quarter. Reduction 8 → 2 6 → 1.5 8 cm 2 cm 1.5 cm 6 cm

  6. Double the size of the shape. Half the size of the shape. Created by Mr. Lafferty Maths Dept.

  7. Scale Drawings Now try N4 Lifeskills TJ Ex 1 Ch16 (page 129) www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  8. Starter Questions www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  9. Scales Learning Intention Success Criteria • To understand the term scale. • 1. We are learning about scales on drawings. 2. Calculate the real-life distance given a scale factor. www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  10. Scales In order to make sense of a map or scale diagram the scale must be known. For this scale model 1 cm represents 1.5 m www.mathsrevision.com This means for 1 cm on the drawing represents in real-life 1.5 m Created by Mr. Lafferty Maths Dept.

  11. Scales Working with scales is simply using proportion. Are we expecting more or less Make bigger fraction Drawing Real-Life www.mathsrevision.com 1 → 1.5 4 → 19-Dec-19 Created by Mr. Lafferty Maths Dept.

  12. Scales The scale of this drawing is 1cm = 5m What is the actual length of the tree ? www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  13. Scales Working with scales is simply using proportion. Are we expecting more or less Make bigger fraction Drawing Real-Life www.mathsrevision.com 1 → 5 7 → 19-Dec-19 Created by Mr. Lafferty Maths Dept.

  14. Scales The scale of this drawing is 1cm = 54m What is the actual height of the Eiffel Tower in metres ? www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

  15. Scales Working with scales is simply using proportion. Are we expecting more or less Make bigger fraction Drawing Real-Life www.mathsrevision.com 1 → 54 6 → 19-Dec-19 Created by Mr. Lafferty Maths Dept.

  16. Scales Problem The scaled drawing has a scale of 1cm = 2.5m XT measures 4cm of the drawing and represents a steel wire support for the flag pole. What is the real-life length of the wire. www.mathsrevision.com T X Created by Mr. Lafferty Maths Dept.

  17. Scales Working with scales is simply using proportion. Are we expecting more or less Make bigger fraction Drawing Real-Life www.mathsrevision.com 1 → 2.5 4 → 19-Dec-19 Created by Mr. Lafferty Maths Dept.

  18. Have you updated your Learning book ? Scale Drawings Now try N4 Lifeskills TJ Ex 2 Ch16 (page 131) www.mathsrevision.com Created by Mr. Lafferty Maths Dept.

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