Question

Can u pls answer 12th answer

Answer 1

Answer:

hope this helps

Step-by-step explanation:

A=(−1,−2),B=(1,0),C=(−1,2),D=(−3,0)

By distance formula,

d(A,B)=

(1+1)

2

+(0+2)

2

=2

2

d(B,C)=

(−1−1)

2

+(2−0)

2

=2

2

Also, CD=2

2  

,DA=2

2

∴AB=BC=CD=AD ....(1)

Slope of AB=

−2  

−2  

=1  

Slope of BC=

−1−1  

2  

=−1

Hence, slope of AB × slope of BC =−1

∴AB is perpendicular to BC

The lengths of the adjacent sides are equal and they perpendicular to each other.

Therefore, the polygon is a square.