Answers

1. ( 2.1, -3.6) is the coordinates of the fourth vertex.

   What are coordinates?

   A coordinate system in geometry is a way to use one or more integers, or coordinates, to determine the exact placement of points or other geometrical objects on a manifold, such as Euclidean space.

   So, define the missing coordinates as such (a,b).

   Let’s use the midpoint formula to find the incorrect coordinate now.

   The point of reference should be (-2.3, 3.6) A.

   Point B should be (2.3, 2.2).

   (2.1, 2.2) Make C the focal focus.

   At BD, AC’s center should be.

   Step 1: Find the center of the AC.

   Center point of AC:

   (-2.3 + 2.1/2), (-3.6 + 2.2/2)

   (0.2/2), (1.4/2)

   (-0.1, -0.7)

   In step two, let’s compare the midpoints.

   The BD halfway point:

   (a + -2.3/2), (b + 2.2/2) =  (-0.1, -0.7)

   (a + -2.3/2) = -0.1

   (a -2.3/2) = -0.1*2

   a = -0.2+2.3

   a = 2.1

   (b + 2.2/2) = -0.7

   b + 2.2 = -0.7*2

   b + 2.2 = -1.4

   b = -1.4 -2.2

   b = -3.6

   Therefore, ( 2.1, -3.6) is the coordinates of the fourth vertex.

   Know more about coordinates here:

   brainly.com/question/29362355

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   Complete question:

   Freddy drew a plan for a rectangular piece of material that hehe will use for a blanket. Three of the vertices are ​( -2.3 and −3.6​), ​(−2.3​, and 2.2​), and ​(2.1​, and 2.2​). What are the coordinates of the fourth​ vertex?

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