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Arwynebedd

Arwynebedd. HYD. LLED. Tasg 1. Ewch i fesur hyd a lled tri peth yn y dosbarth. (2) Mesurwch i’r centimetr agosaf. (3)Cofiwch i nodi’r uned fesur ar eich nodyn Gludiog. Bydd 2 funud gyda chi!. EWCH I FESUR!. 1 cm. 1 cm.

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Arwynebedd

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  1. Arwynebedd

  2. HYD LLED

  3. Tasg 1 • Ewch i fesur hyd a lled tri peth yn y • dosbarth. (2) Mesurwch i’r centimetr agosaf. (3)Cofiwch i nodi’r uned fesur ar eich nodyn Gludiog. Bydd 2 funud gyda chi! EWCH I FESUR!

  4. 1 cm 1 cm Arwynebeddydy’rmesuriadsyddyndangos faint o le maesiapyncymryd. Rydymynmesurarwynebeddmewnsgwariau; felsgwariaucentimetr Mae’r petryal yma yn cymryd lle 28 sgwar. Rydym yn dweud felly bod ganddio ARWYNEBEDD o 28 sgwar centimetr 28 cm2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

  5. Gall gymryd amser hir i orchuddio siap gyda sgwariau. Mae yna ffordd llawer gynt. 7 cm 4 cm Dyma’r unded fesur. Centimetr sgwar. × = 28 cm2

  6. Cwis (1)Beth ydyarwynebedd? (2) Beth ydyunedfesur arwynebedd? (3) Beth ydy’rfformiwlai gyfrifoarwynebedd?

  7. Gallwch chi feddwl am ffordd o gyfrifo arwynebedd y siap yma? 5 cm 8 cm 7 cm 3 cm 12 cm

  8. Beth am dorri’r siap i ddau betryal? 5 cm 8 cm 7 cm 3 cm 12 cm

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