AC = BC = 5 cm ∴ AB \$latex =\\sqrt{AC^{2">
If △ABC is an isosceles triangles with ∠C = = 90° and AC = 5 cm, then AB is:
[A] $5\sqrt{2}cm$
[B] $2.5 cm$
[C] $5 cm$
[D] $10 cm$