Three circles of radius 1 are drawn, each tangent to each other. Find the radius of the large circle.
Sorry mate but I don't know how to help.
One thing you could do is:
- Draw an equilateral triangle in the middle (each point connecting to the centre of the small circles)
--> The length of the triangle sides would = 2
- Use this formula to find the distance from the vertices of the triangle to the centre:
--> https://www.quora.com/What-is-the-distance-between-the-centre-of-an-equilateral-triangle-and-any-of-its-vertices
- + 1 (length of the radius)
Hope this helps (pretty sure this is not the way to go about it but it logically works)..
:) <3