A rectangle is shown on a coordinate plane with vertices A(-4,8), B(1,8), C(1,-1), and D(-4,-1) What are the dimensions of the rectangle?

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step-by-step explanation:

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)