Hello, algebraisabeast!

An arch over a door is 60 cm high and 200 cm wide.

Find the radius of a circle containing the arc of the arch.Code:C * o * * | * A o - - - o - - - o B * |D * * | *R * | * * O

The radius of the circle is:

The width of the arch is:

The height of the arch is:

. . Hence:

In right triangle

So we have: .

Therefore: . cm.