Question

solve them plzzz....7,8and 9...​

Answer 1

Answer:

Step-by-step explanation:

FOR 8th,

              A(5,6) B(1,5)  C(2,1)  D(6,2)

          BY DISTANCE FORMULA:

        d(A,B)= under root (1-5)^2 + (5-6)^2

                  = under root 16 + 1

                  = under root 17  

        d(B,C)= under root (2-1)^2 + (1-5)^2

                  = under root 1+16

                  = under root 17

   

       d(C,D)= under root (6-2)^2 + (2-1)^2

                 = under root 16 + 1

                 = under root 17

       d(A,D)= under root (6-5)^2 + (2-6)^2

                 = under root 1+16

                 = under root 17

therefore,

               distance between two points are same,hence it is a square.

• 9th is similar as 8th .
• I don't know 7th .