Coordinate Geometry Flashcards

1
Q

Hafaliad hyd llinell

A

Square root of (X2-X1)^2 + (Y2-Y1)^2

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2
Q

Hafaliad canolbwynt llinell

A

(X1 + X2) / 2 , (Y1 + Y2)/2

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3
Q

Hafaliad llinell syth

A

Y1 - Y = m(x - x1)

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4
Q

Hafaliad graddiant

A

y2-y1 / x2-x1

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5
Q

Triongl isosceles

A

Dau ochr allan o dri yn hafal

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6
Q

Dau linell perpendicular

A

Dau atab yn lluosi i -1

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7
Q

Triongl ongl sgwar

A

Os ydi a^2 + b^2 = c^2

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8
Q

Llinella parallel

A

Dau atab yr un peth

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