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Ffocws dysgu

Dysga sut i ddefnyddio sgiliau geometreg er mwyn adnabod a defnyddio enwau siapiau 2D a 3D.

Mae'r wers hon yn cynnwys:

• un fideo
• un gweithgaredd

Learning focus

Learn how to use geometry skills to recognise and use the names of 2D and 3D shapes.

This lesson includes:

• one video
• one activity

Fideo / Video

Nodiadau i rieni

Ar ôl gwylio'r fideo, bydd disgyblion yn gwybod y canlynol.

• Mae gan siapiau 3D tri dimensiwn - hyd, lled a dyfnder.
• Mae sgwâr yn troi’n giwb ac mae gan giwb 6 wyneb sgwâr. Mae ciwb wedi ymestyn yn gwneud ciwboid. Mae ganddo 2 wyneb sgwâr a 4 wyneb petryal.
• Mae triongl yn troi’n byramid. Mae gan byramid sylfaen sgwâr 4 wyneb trionglog a 1 wyneb sgwâr. Gellir cael pyramidau gyda gwahanol sylfaen hefyd.
• Mae cylch yn troi’n sffêr. Mae ganddo un wyneb crwn.

Notes for parents

After watching the video, students will know the following.

• 3D shapes have 3 dimensions - length, width and depth.
• A square turns into a cube and a cube has 6 square faces. A stretched cube is called a cuboid, it has 2 square faces and 4 rectangular faces.
• A triangle turns into a pyramid. A square based pyramid has 4 triangular faces and 1 square face. Pyramids can have bases of different shapes.
• A circle turns into a sphere. It has one round face.

Gweithgaredd / Activity

Enwa’r siapiau 3D.
Name the 3D shapes.