For question 1 use following proportion: area of sector/area of circle = size of central angle/360
We are given central angle = 66 and the area of the circle = PI * radius^2, where radius is given a 7 cm.
For question 2: when two chords intersect in a circle, the product of the lengths of their segments is equal, i.e., CE * ED = BE * EA. Use that relationship to solve for x and find length of chords.
For question 3: a chord is a segment that connects two points on a circle. A diameter is a chord that passes through the circle's center. The radius is one-half the circle's diameter. A tangent touches a circle at exactly one point and never enters the circle's interior. A secant is a line segment that passes through 2 points on a circle and is an infinite extension of a chord. Based on those definitions PQ, RS and WX are chords, WX is a diameter, WT and TX are radii and u and v are tangents.