Find the distance CD rounded to the nearest tenth.
C = (4,7) D = (7,11)
CD = [?]
HINT: Use the distance formula:
d=(x2 – Xı)2 + (y2 - Yı)2

Distance between two points given by the formula

d

=

√

(

x

2

−

x

1

)

2

+

(

y

2

−

y

1

)

2

−−→

C

D

=

√

(

5

−

2

)

2

+

(

6

−

2

)

2

−−→

C

D

=

√

3

2

+

4

2

=

√

25

⇒

5

here u go

mark me the brainliest plz

there are lots of ways.   pick's theorem tells us if the vertices are lattice points the area a is

a = b/2 + i - 1

where b is the number of boundary lattice points and i is the number of interior lattice points.

in the figure i count b=16, i=50 so

a = 8 + 50 - 1 = 57

let's try the shoelace formula.   the area is half the sum of the cross products of the sides.  

a(-2,6)   -2(2)-6(-5) = 26

b(-5,2)   -5(-3) - 2(-2) = 19

c(-2,-3) -2(-3) - (-3)(4) = 18

d(4,-3)   4(3) - (-3)(5) = 27

e(5,3)   5(3) - 3(1) = 12

f(1,3)     1(6) - 3(-2) = 12

a(-2,6)

each of the cross products is twice the area of the triangle with the associated side and one vertex the origin. so the area of abo=26/2=13.

area = (1/2) (26 + 19 +   18 + 27 + 12 + 12) = 57

that checks!