Which tool and technique is used to measure the suface area of an object?

Question:i need the anwser for my bro

Answers:
use a ruler or tape measure. you havnt measured before?
Tools -- Tape Measure or Ruler
Technique -- Measure Width, then length, then multiply the two
Technique :-

Multiply all the sides to each other, for example a cube's surface area is 6*a^2 , if it is a circular object then you must multiply the circumference with hieght

tools

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