Two circles have the same center but different radii. which of the following is true about the circles? a. they are not similar because they have different radii. b. they are congruent because they have the same center. c. they are congruent because they have the same shape and size. d. they are similar because they are of the same shape but different size.

20 points for the answer. this is for real , don't put random ! a rectangle has a length of 4 centimeters and a width of 7 centimeters. what is the effect on the perimeter when the dimensions are multiplied by 5? the perimeter is increased by a factor of 5. the perimeter is increased by a factor of 20. the perimeter is increased by a factor of 25. the perimeter is increased by a factor of 100.