The perimeter of △CDE is 9.66 units
Perimeter of a triangle
The perimeter of a triangle is the sum of the sides of the triangle.
Given the coordinate points C(4, -1), D(4, −5), and E(2, −3)
Determine the distance CD, CE and DE using the distance formula
CD = √(-5+1)²+(4-4)²
CD = √16+0
CD = √16
CD = 4units
CE = √(-3+1)²+(2-4)²
CE = √4+4
CE = 2.83 units
DE= √(-3+5)²+(2-4)²
DE = √8
DE = 2.83 units
Take the sum
Perimeter of triangle CDE = 4 + 2.83 + 2.83
Perimeter of triangle CDE = 9.66 units
Hence the perimeter of △CDE is 9.66 units
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