Perimeter and area of a rectangle of cardboard measuring 5.6 cm by 16.7 cm

step-by-step explanation:

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you could deduce the conclusion directly using the facts pertaining to the specific situation.

hope this .

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)