Question

diameters of two circles is 7cm and 3 cm respectively, so their radii will be​

Answer 1

Answer:

ans:- radius=diameter/ 2

a) 7/2=3.5 cm

b) 3/2= 1.5cm

the radii will be 3.5cm and 1.5

Answer 2

Explanation:

Answer: 7 cm.

Vol 77

Step by step explanation :

Refer the given attachment for the

figure.

Here,

Given that :

Diameter of First circle = 8 cm. Diameter of second circle = 6 cm.

Thus,

Radius of first circle = AE = 4 cm. Radius of second circle = EC = 3 cm.

Now,

We know that,

If two circles touch each other externally, distance between their centres is equal to the sum of their radii.

This means that :

AE + EC = Distance between their

centres

AE + EC = 4 + 3 = 7 cm.

Thus, Distance between their centres is 7 cm.