Select all of the true statements. Group of answer choices π π π is the area of a circle of radius 1. π π π π is the area of a circle of diameter 1. π π π π is the circumference of a circle of radius 1. π π π π is the circumference of a circle of diameter 1. π π π π is the constant of proportionality relating the diameter of a circle to its circumference. π π π π is the co

- π is the area of a circle of radius 1

-  π is the circumference of a circle of diameter 1

- π is the constant of proportionality relating the diameter of a circle to its circumference

Step-by-step explanation:

Area of a circle = πr² or πd²/4

Circumference of a circle = 2πr or πd

r is the radius

d is the diameter

If radius = 1

Area = π(1)²

Area = π

hence π is the area of a circle of radius 1 is CORRECT

Given d = 1

Area = πd²/4

Area = π(1)²/4

Area =  π/4

Hence π is the area of a circle of diameter 1 is INCORRECT

For the circumference;

C = 2πr or πd

If r =1

C = 2π(1)

C = 2π

Hence π is the circumference of a circle of radius 1 is INCORRECT

Also if d = 1;

C = πd

C = π(1)

C = π

hence  π is the circumference of a circle of diameter 1 is CORRECT

Since C = πd, then π is the constant of proportionality relating the diameter of a circle to its circumference is CORRECT

investment b is an ordinary annuity with $3,909.64 in the account after one year.

step-by-step explanation: