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Math·Geometry and Trigonometry·Lines, angles, and triangles

easy

In triangle $ABC$, $AB=4,290\text{ mm}$ and $BC=4,290\text{ mm}$. Which statement is sufficient to prove that triangle $ABC$ is equilateral?

A

$AC=4.29\text{ mm}$

B

$AC=42.9\text{ mm}$

C

$AC=429\text{ mm}$

D

$AC=4,290\text{ mm}$