The two circles have a common center, the radius of one circle is 4 cm, and this is 2/5 of the diameter

The two circles have a common center, the radius of one circle is 4 cm, and this is 2/5 of the diameter of the second circle. Draw these circles.

To complete this task, you need to find the radius of the second circle.

Let’s consider this condition and analyze it.

By the terms of the assignment, we know that the radius of one circle is four centimeters, and the diameter of the second circle is 4 cm, which is two-fifths of its diameter.

Find the diameter of the second circle using the available data;

To do this, multiply the radius of the first circle by the value of the part of the second diameter;

4 * 2/5 = 8/5 = 1.6cm – the diameter of the second circle;

As;

d = 2 * r;

r = d / 2;

Let’s substitute the data;

r = 1.6 / 2 = 0.8cm – the radius of the second circle.