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Candle Geometry Activities

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Candle Geometry Activities

A small candle workshop is designing new candles. Use the diagrams and information on this page to explore 3D shapes, angles, measurement and volume. Use π ≈ 3.14 where needed. Show calculations with units.

Solids in the workshop

The workshop makes pillar candles, block candles, and decorative candles.

1.A pillar candle has two circular ends and one curved surface. Which 3D solid best describes its shape?
  • Cylinder
  • Cone
  • Rectangular prism
  • Sphere
2.A block candle is a rectangular prism. How many faces, edges and vertices does it have?
3.A cube-shaped candle and a rectangular-prism candle are both prisms. Name one property they share and one way their shapes can differ.
4.Choose a cylinder, cone, cube or rectangular prism. Sketch it as a candle and label one face, one edge and one vertex if your chosen solid has them.

Angles in the flame design

A designer uses line segments to plan a flame motif. The angle shown is the opening between the two rays.

5.The flame motif has an angle of 118°. Is it acute, right, obtuse or straight?
  • Acute
  • Right
  • Obtuse
  • Straight
6.Two adjacent angles on a straight line measure 64° and x°. Calculate x.
7.Draw an angle of 45° for a small flame detail. Label it and state whether it is acute, right or obtuse.

Measure and calculate

Use the given dimensions to help the workshop estimate how much wax each candle needs.

8.A candle wick is 4.6 cm long. Write this length in millimetres, then decide whether it is shorter than or longer than 5 cm.
9.A rectangular-prism candle is 8 cm long, 5 cm wide and 12 cm high. Calculate its volume using V = length × width × height.
10.A cylindrical candle has radius 3 cm and height 10 cm. Use V = πr²h and π ≈ 3.14 to calculate its volume to 2 decimal places.
11.The block candle holds 480 cm³ of wax and the pillar candle holds 282.60 cm³. Which holds more wax, and how much more?

3 printable pages

  • Candle Geometry Activities, page 1 of 3: Solids in the workshop

    Page 1

  • Candle Geometry Activities, page 2 of 3: Angles in the flame design, Measure and calculate

    Page 2

  • Candle Geometry Activities, page 3 of 3: 10. A cylindrical candle has radius 3 cm and height 10 cm. Use V = πr²h and π ≈ 3.14 to…

    Page 3

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