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Ffocws dysgu

Dysga ddefnyddio sgiliau geometreg i adnabod a chategoreiddio trionglau.

Mae'r wers hon yn cynnwys:

• un fideo
• dau weithgaredd

Learning focus

Learn to use geometry skills to recognise and classify triangles.

This lesson includes:

• one video
• two activities

Wedi ei chreu mewn partneriaeth â .

Fideo / Video

Y pedwar prif fath o drionglau a'u priodweddau.

The four main types of triangles and their characteristics.

Nodiadau i rieni

• Mae pedwar math o driongl.
• Mae gan driongl isosgeles ddau ochr o hyd cyfartal (yr un peth), a dwy ongl gyfartal.
• Mae gan driongl hafalochrog dri ochr o hyd cyfartal, a thair ongl gyfartal. Mae pob ongl yn 60 gradd.
• Mewn triongl anhafalochrog, mae pob ochr a phob ongl o feintiau gwahanol.
• Mae gan driongl ongl sgwâr un ongl sy’n 90 gradd.

Notes for parents

• *There are four types of triangle. *
• An isosceles triangle has two equal sides and two equal angles.
• An equilateral triangle has three equal sides and three equal angles. Each angle is 60 degrees.
• In a scalene triangle, all sides and all angles are different.
• A right-angled triangle has one right angle which is 90 degrees.

Trionglau / Triangles

Mae pedwar math o driongl. Mae gan bob un dri ochr, ac maen nhw’n bolygonau.

1. Hafalochrog

Mae gan drionglau hafalochrog dri ochr hafal a thair ongl hafal 60°.

2. Isosgeles

Mae gan drionglau isosgeles ddau ochr hafal a dwy ongl hafal.

3. Ongl sgwâr

Mewn trionglau ongl sgwâr mae un o’r onglau yn ongl sgwâr (90°).

4. Anghyfochrog

Does gan drionglau anghyfochrog ddim ochrau hafal nac onglau hafal.

There are four types of triangle. They all have three sides and are polygons.

1. Equilateral

Equilateral triangles have three equal sides and three equal angles of 60°.

2. Isosceles

Isosceles triangles have two equal sides and two equal angles.

3. Right-angled

One of the angles is a right angle (90°) in right-angled triangles.

4. Scalene

Scalene triangles have no equal sides and no equal angles.

Gweithgaredd 1 / Activity 1

Labela’r trionglau.

Label the triangles.

Gweithgaredd 2 / Activity 2

Lawrlwytha'r daflen waith isod o wefan Twinkl am fwy o waith ar drionglau.

Download the worksheet from the Twinkl website below for more work on triangles.