Decide whether each of the statements is true or false. provide a counterexample if the answer is false.
a. if a figure has exactly two lines of symmetry, it has exactly two rotational symmetries (including the identity symmetry).
b. if a figure has at least three lines of symmetry, it has at least three rotational symmetries (including the identity symmetry).
c. if a figure has exactly two rotational symmetries (including the identity symmetry), it has exactly two lines of symmetry.
d. if a figure has at least three rotational symmetries (including the identity symmetry), it has at least three lines of symmetry.

5

step-by-step explanation:

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.

150

step-by-step explanation:

(sorry i'm not typing it again just read the other two explanation sections i just typed it'll be the same.)