Cyn gwers SOHCAHTOA TGAU

SOHCAHTOA

TGAU Mathemateg || GCSE Mathematics

Multiple Choice

Rydym ond yn medru defnyddio SOHCAHTOA ar gyfer trionglau ongl sgwar.

We can only use SOHCAHTOA for right angled triangles.

• False
• True

Fill in the Blank

Mae onglau mewn triongl yn adio i wneud...

Angles in a triangle add up to make...

Labelling

Labelwch / Label

Drag labels to their correct position on the image

Cyferbyn / Opposite

Agos / Adjacent

Hypotenws / Hypotenuse

Fill in the Blank

Beth yw c?

What is c?

​Hypotenws

​Cyferbyn

​Agos

Labelling

Labelwch / Label

Drag labels to their correct position on the image

Cyferbyn / Opposite

Agos / Adjacent

Hypotenws / Hypotenuse

​

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Datrys Hafaliadau Solving Equations

Multiple Choice

Datryswch / Solve

$$\frac{x}{4}=20$$

• 60
• 80
• 100
• 5

Multiple Choice

Datryswch / Solve

$$\frac{48}{x}=6$$

• 6
• 8
• 12
• 7

Multiple Choice

Datryswch / Solve

$$\frac{x}{5}=10$$

• 0.5

• 15
• 50
• 2

Sin / Cos / Tan

Os ydych yn gwybod yr ongl, yna defnyddiwch sin/cos/tan.
If you know the angle, then use sin/cos/tan.

Os nad ydych yn gwybod yr ongl, yna defnyddiwch sin^-1 / cos^-1 / tan^-1.
If you don't know the angle then use sin^-1 / cos^-1 / tan^-1.

x = sin 30 tan x = 1
x = 0.5 x = tan^-1 1
x = 45^o

Fill in the Blank

Beth yw sin 45 ? (i 3 lle degol)

What is sin 45? (to 3 decimal places)

.

Fill in the Blank

Beth yw tan 26 ? (i 3 lle degol)

What is tan 26 ? (to 3 decimal places)

.

Fill in the Blank

Datryswch / Solve

cos x = 0.5

Fill in the Blank

Datryswch / Solve

cos x = 0