적당하다 and 적절하다
What is the difference between 적당하다 and 적절하다?

Question

Answer

적당하다 is more commonly used for physical suitableness like size, volume, height, weight, temperature
적절하다 is more commonly used for conceptual suitableness like usage, expression, speech, timing, position, action
e.g.
크기가 적당하다
무게가 적당하다
표현이 적절하다
그는 야구 감독으로 적절하다.

Answer

Hi
적절하다 is perfect same, 
적정하다 is almost same but not perfect.
thank you.

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