4. A diameter of a circle is 8 3 cm long, and a chord is 8 cm long. Find the distance between the
center of the chord and the center of the circle.
8 3 𝑐𝑚
8 𝑐𝑚
𝑥
5. A radius of a circle is 12 cm long. How long is the chord that has a distance of 8 cm from the
center of the circle?
12 𝑐𝑚
8 cm
6. Malinta Tunnel was located in Corregidor. It served as a bomb shelter during
World War II. During the Siege of Corregidor, Gen. McArthur set up one of his
headquarters here. It was named “malinta” (lots of leeches) because when they
started digging it in 1992, there were a lot of leeches there. It took 10 years to
finish constructing the tunnel. Say, you redraw the tunnel following the
specifications given in the illustration on the right. If AE=4 11 𝑓𝑒𝑒𝑡 and OD=10
feet, how wide (x) is the tunnel?
10 𝑓𝑡
𝐵
𝐴
𝐸 𝐷
𝐶
𝑂