Royal Institution Primary Maths Masterclasses Curve Stitching If

Royal Institution Primary Maths Masterclasses Curve Stitching If I throw a ball across the room, what shape will it make in the air? rigb. org @Ri_Science

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The CHRISTMAS LECTURES are the Ri’s most famous activity and are televised on the BBC. The first maths lectures by Prof. Sir Christopher Zeeman in 1978 started off the Masterclass programme! Christmas Lecturers include Michael Faraday, David Attenborough, Carl Sagan, Richard Dawkins, Alison Woollard, Saiful Islam & Alice Roberts Image credits: Tim Mitchell, Paul Wilkinson

Royal Institution videos • CHRISTMAS LECTURES – on the Ri website

Royal Institution videos • CHRISTMAS LECTURES – on the Ri website • Ri on You. Tube – experiments, videos & talks for all ages

Royal Institution videos • CHRISTMAS LECTURES – on the Ri website • Ri on You. Tube – experiments, videos & talks for all ages • Expe. Rimental – science experiments at home

If I throw a ball across the room, what shape will it make in the air?

youtu. be/1 Pyj. LXIYMz. I

Built: 9 th and 14 th centuries Height: 20 m (estimate) Curve type: parabola Image credit: Parabolic arches in Celler de Sant Cugat, Josep Renalias CC BY-SA

Built: 1887 Height: 327 m Curve type: parabola

3 cm

Now turn paper over On back of sheet, draw 8 blobs along bottom edge

Now turn paper back over to see front

Parabola Axis of symmetry Focus Vertex Directrix

Parabolas in science Puerto Rico: 300 m diameter radio telescope Focus Parabola with mirrored interior surface PARABOLOID: name for 3 D parabola ‘dish’ Image credit: Jido. BG via Wikimedia, NASA, Gerard Eviston and Justified Sinner via Flickr In Space: Hubble Telescope On Earth: Satellite dishes UK: WWII listening mirrors to detect enemy aircraft NASA

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Parabola stitching • Card • Foam mat • Ruler & pencil • Needle and thread • Stickers

Royal Institution Primary Maths Masterclasses Curve Stitching Image credit: Jennifer Balakrishnan/The Guardian

• Throwing a ball

• Throwing a ball • Parabola folding

• Throwing a ball • Parabola folding • Parabola drawing

• Throwing a ball • Parabola folding • Parabola drawing • Parabola sewing

Using maths to create a parabola Optional extension activity. Simplest parabola equation y=x 2 Parabola equation – change variables to see different parabola shapes https: //www. mathsisfun. com/geometry/parabola. html

What else can I do to extend my knowledge? Try this extra activity in class, or at home… Curve Spotting nrich. maths. org/8287

What else can I do to extend my knowledge? Try this extra activity in class, or at home… Straight to Curves nrich. maths. org/7010

What else can I do to extend my knowledge? Vi Hart - Connecting Dots - bit. ly/vihart-dots Math Craft: Parabolic Curves - bit. ly/parabolic-curves Parabolic Curve art activity - bit. ly/parabolic-art Parabolic Christmas Cards - bit. ly/solvingforxmas

Royal Institution Primary Maths Masterclasses Curve Stitching Thank you! Image credit: Jennifer Balakrishnan/The Guardian