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3) The exact side length is 3.87

4) 8.66

5) 49

6) 1.69

Step-by-step explanation:

3)

4)

5)

6)

3:√15 in

4: 5√3 m

5: 49 m²

6: 1.69 in²

Step-by-step explanation:

To find the area of a square you take the lenght and multiply it by its width

The special thing about a square is that all sides are equal meaning length=width so we only need one side to get all the information we need

For this question x will be the side of a square

3: Area= x²

15=x²

√15=x

4: same deal as 3

75=x²

√75=5√3

5: This is even easier then the other two

we adjust our equation to look like the following

area=side²

so area=7²=49

49

6: same deal as before

1.3²=1.69

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.