Xác định tiếp tuyến của đường tròn: độ dài cạnh

A circle with a line segment connecting the center of the circle to a point on the top left of its circumference. A line slants up from left to right passing through the point on the circumference making a perpendicular intersection.

A circle centered around point O. Segment O C is a radius of the circle. Point A lies outside the circle, and line A C is a line that could potentially be tangent to circle O. A line segment connects point A to point O and intersects the circle at point B. Line segment A O, line segment O C, and line A C create the triangle A O C. Side A C of the triangle is eleven units. Side O C of the triangle is five units. Side A O is broken into two line segments, A B and B O. Line segment A B is eight units. Line segment B O is five units. There is a line that measures the distance of side A O as thirteen units.

A circle with a line segment connecting the center of the circle to a point on the top left of its circumference. A line slants up from left to right passing through the point on the circumference making a perpendicular intersection.

A circle centered around point O. Segment O C is a radius of the circle. Point A lies outside the circle, and line A C is a line that could potentially be tangent to circle O. A line segment connects point A to point O and intersects the circle at point B. Line segment A O, line segment O C, and line A C create the triangle A O C. Side A C of the triangle is sixteen units. Side O C of the triangle is twelve units. Side A O is broken into two line segments, A B and B O. Line segment A B is eight units. Line segment B O is unknown. There is a line that measures the distance of side A O as twenty units.