Circles in the same plane and having the same center are called congruent circles.

true
or
false

False

Step-by-step explanation:

Two figures are said to be congruent if they have same shape and same size.

Here, we need to check whether circles in the same plane and having the same center are congruent or not.

Two circles are said to be congruent if they have same radius , diameter ,circumference , surface area .

For example if we consider two circles with centre of both the circles as origin and radius as 5 cm and 8 cm.

These two circles lie in the same plane and have same centre but they are not congruent as they have different radius .

So, the given statement is false.

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

126.66 m²

step-by-step explanation:

the pertinent area formula is a = πr², where r is the radius.

here, a = π(6.35 m)² = 40.32π, or approximately 126.66 m²