Circle chapter question
Understand the Problem
The question appears to reference a chapter related to circles, likely in a mathematics context. It may pertain to topics such as properties of circles, calculations involving radius, diameter, circumference, or area.
Answer
Chord length is 4 cm.
Two concentric circles with radii 5 cm and 3 cm have a chord 4 cm long touching the smaller circle.
Answer for screen readers
Two concentric circles with radii 5 cm and 3 cm have a chord 4 cm long touching the smaller circle.
More Information
In geometry, when a chord of a larger circle touches a smaller, concentric circle, the length of the chord can be determined using the Pythagorean theorem because the radius creates a right triangle with half of the chord as one leg.
Tips
A common mistake is neglecting to consider the geometry of right triangles and the Pythagorean theorem in these situations.
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