Drawing a Design So Someone Else Can Build It · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

Draw it so someone else can build it

Design & Technology · Designing & Making · ages 10-12
Name ______________________   Date ____________

  1. Leo makes a drawing of a birdhouse but writes no scale and no dimensions on it. A friend in another town can still build a birdhouse exactly the size Leo imagined, just from the drawing.

    Circle one:   True   False

  2. Maya draws a bookshelf using the scale 1 cm on the drawing = 10 cm in real life. On her drawing the bookshelf is 12 cm tall. How tall will the real bookshelf be?

    • 12 cm
    • 120 cm
    • 22 cm
    • 1200 cm

  3. What is a design drawing for?

    • To look pretty on the wall
    • To keep the idea secret
    • To instruct a builder without questions

  4. A good design drawing lets a stranger build the thing without asking questions.

    Circle one:   True   False

  5. A design drawing shows a rectangular sandpit with dimensions 6 m by 4 m. The builder needs a wooden border all the way around the outside edge. How many metres of wood does the builder need?

    Answer: ______________

  6. A drawing shows a sandpit 6 m by 4 m. Wood must run all round the edge. How many metres of wood are needed?

    Answer: ______________

  7. A bookshelf drawing uses the scale 1 cm = 10 cm. The drawn shelf is 12 cm tall. How tall is the real shelf in cm?

    Answer: ______________

  8. An architect draws a classroom wall at the scale 1:50. That means 1 cm on the drawing stands for 50 cm on the real wall. The real wall is 400 cm long. How many centimetres long should the wall be on the drawing?

    Answer: ______________

  9. A wall is 400 cm long. Draw it at the scale 1 cm = 50 cm. How many cm long is the drawn wall?

    Answer: ______________

  10. A builder cannot tell how the inside parts of a toy fit. Which view helps most?

    • An exploded view
    • A coloured copy of the same front view
    • A smaller copy of the same front view
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Answer key

For grown-ups. Fold this page away before handing over the rest.

Draw it so someone else can build it W1-mt_8ezErqUhZw-s1

  1. False · Without a scale or real dimensions, the drawing only shows the shape, not the size. A builder would have to guess, so the missing scale or dimensions are what stop the build.
  2. 120 cm · The scale tells you each centimetre on the drawing stands for 10 real centimetres, so 12 drawn centimetres means 12 groups of 10, which is 120 cm.
  3. To instruct a builder without questions · The drawing carries sizes and scale so a stranger can build alone.
  4. True · Sizes, units and scale answer every question in advance.
  5. 20 · The border is the perimeter of the rectangle. The two long sides are 6 m each and the two short sides are 4 m each, which adds up to 20 m.
  6. 20 · The border runs all four sides: 6 + 6 + 4 + 4 makes 20.
  7. 120 · Each drawn centimetre stands for 10 real ones, so 12 groups of 10 make 120.
  8. 8 · Going from real size to drawing size you divide by the scale factor: 400 divided by 50 is 8, so the wall is 8 cm long on the drawing.
  9. 8 · Going from real size to drawing size, divide by the scale: 400 by 50 is 8.
  10. An exploded view · Pulled apart parts reveal the hidden fit that one flat view conceals.
Worksheet · LightMySky