No. It's 9 times greater. The area changes according to the square of
the number that you use to multiply all the linear dimensions.
"3 squared" = 32 = 3 x 3 = 9
If you made the dimensions of the triangle 10 times bigger, the area
would become 102 = 100 times greater.
If only the length is changed and all other dimensions left unchanged, the volume will also triple.
27
10 x 3 = 30
C1 = pi x D, C2 = pi x 3 x D, so the circumference is also tripled.
The circle becomes an oval
No - if the lengths of the sides are all increased by a factor of 3, the angles remain unchanged. You just wind up with a "similar" triangle 3 times the size of the original. A quick counterexample would be to consider what would happen if the angles DID change. The sum of the angles in the original triangle should be 180°. If the angles in the new, larger triangle tripled in size, the sum of the angles in the bigger triangle would be 540° - but the sum of the angles of a triangle should always remain 180°.
If the radius is tripled then the Area will be greater by a factor of 9. And the circumference will be greater by a factor of 3.
three
The perimeter will be tripled.
It is multiplied by nine.
tripled
The volume goes up by 9 times
it becomes three times larger
half
Volume is proportional to the cube (3rd power) of the linear dimensions.If the side of the cube is tripled, the volume increasesby a factor of (3)3 = 27 .
It will be 9 times as large. And that will be true for any plane shape, not just an equilateral triangle.
The original volume is multiplied by 27.