Find the centroids of the triangles whose vertices are given below. (1)(-7, 6), (2, -2), (8, 5).
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Step-by-step explanation:
Centroid is ((-7+2+8)/3 , (6-2+5)/3)
= (1,3)
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Answer:
The coordinates of the centroid of the triangle are ( 1, 3 ).
Step-by-step-explanation:
Let the triangle be ABC.
The coordinates of the given points are
- A ( - 7, 6 ) ≡ ( x₁, y₁ )
- B ( 2, - 2 ) ≡ ( x₂, y₂ )
- C ( 8, 5 ) ≡ ( x₃, y₃ )
We have to find the coordinates of the centroid of the triangle.
Let the coordinates of centroid be G ( x, y ).
By centroid formula,
- x = ( x₁ + x₂ + x₃ ) / 3
- y = ( y₁ + y₂ + y₃ ) / 3
Now,
x = ( x₁ + x₂ + x₃ ) / 3
⇒ x = ( - 7 + 2 + 8 ) / 3
⇒ x = ( - 7 + 10 ) / 3
⇒ x = 3 / 3
⇒ x = 1
Now,
y = ( y₁ + y₂ + y₃ ) / 3
⇒ y = ( 6 - 2 + 5 ) / 3
⇒ y = ( 4 + 5 ) / 3
⇒ y = 9 / 3
⇒ y = 3
∴ G ( x, y ) ≡ ( 1, 3 )
∴ The coordinates of the centroid of the triangle are ( 1, 3 ).
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