Question

Two circles with radii 3.5 cm and 2.5 cm touch each other internally. Find the
distance between their centre

Answer 1

Step-by-step explanation:

Answer in above attachment

Answer 2

Given:

• Radius of first circle , ($r_1$) = 3.5 cm
• Radius of second circle,  ($r_2$) = 2.5 cm
• Two circles touch each other internally.

To Find:

• Difference between their radius.

Solution:

• Since the two triangles touch each other internally, it is easy to find the difference between their radius directly using the basic subtraction method.
• Let "r" be the difference between their center.
• Difference between their radii = radius of first circle - radius of second circle.
• Substitute the given values,
• r = $r_1 - r_2$ = 3.5 cm - 2.5 cm
• r = 1 cm.

The difference between their center is 1 cm.