I believe you're looking for rhombus.
Answer:

Step-by-step explanation:

I am joyous to assist you anytime.
Answer:
No polynomials are in standered form.
Step-by-step explanation:
Given polynmials are,



To find the polynomial of two variable in standered form we have to write the sum of the degree of each exponent in descending or ascending order.
(1) 
where sum of degree of exponents are of the form,
Sum of (degree of x+ degree of y)=
which is not a descending order or ascending so it is not a standered form.
(2) 
where sum of degree of exponents are of the form,
Sum of (degree of x+ degree of y)=
which is not a descending or ascending order so it is not a standered form.
(3) 
where sum of degree of exponents are of the form,
Sum of (degree of x+ degree of y)=
which is not a descending or ascending order so it is not a standered form.
Answer:
Step-by-step explanation:
SAS Congruence Postulate