In the adult Rule of Nines, what percentage is assigned to an arm?

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Multiple Choice

In the adult Rule of Nines, what percentage is assigned to an arm?

Explanation:
In adults, the Rule of Nines assigns about 9% of total body surface area to one arm because each arm—from shoulder to fingertip—represents roughly one-ninth of the body's surface. That’s why one arm is 9% and both arms together are 18%, with the remaining regions totaling the rest (legs 18% each, head 9%, trunk anterior 18%, trunk posterior 18%, perineum 1%). The other options don’t fit this standard distribution: 6% would underrepresent a whole limb, 18% would correspond to a leg (or both arms in some schemes), and 13% isn’t used in the Rule of Nines.

In adults, the Rule of Nines assigns about 9% of total body surface area to one arm because each arm—from shoulder to fingertip—represents roughly one-ninth of the body's surface. That’s why one arm is 9% and both arms together are 18%, with the remaining regions totaling the rest (legs 18% each, head 9%, trunk anterior 18%, trunk posterior 18%, perineum 1%). The other options don’t fit this standard distribution: 6% would underrepresent a whole limb, 18% would correspond to a leg (or both arms in some schemes), and 13% isn’t used in the Rule of Nines.

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