Two circles of radii 4 cm and 3 cm have their centres 7 cm apart. First decide how the circles are positioned (sum of radii = 4 + 3 = 7 = distance between centres), then state how many common tangents they have.

Question

Accepted Answer

3. Since distance between centres (7) equals sum of radii (4+3=7), the circles touch externally, giving 3 common tangents.

Two circles of radii 4 cm and 3 cm have their centres 7 cm apart.
First decide how the circles are positioned (sum of radii = 4 + 3 = 7 = distance between centres), then state how many common tangents they have.

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 10 Number of Tangents from a Point practice

Two circles of radii 4 cm and 3 cm have their centres 7 cm apart.First decide how the circles are positioned (sum of radii = 4 + 3 = 7 = distance between centres), then state how many common tangents they have.

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 10 Number of Tangents from a Point practice

Two circles of radii 4 cm and 3 cm have their centres 7 cm apart.
First decide how the circles are positioned (sum of radii = 4 + 3 = 7 = distance between centres), then state how many common tangents they have.