The figure shows an 11-foot ladder leaning against a wall. (a) Use the Pythagorean theorem to find an equation relating x and y. (b) Suppose that the foot of the ladder is being pulled along the ground at the rate of 4 feet per second. How fast is the top end of the ladder sliding down the wall at the time when the foot of the ladder is 8 feet from the wall? That 11 dy at the time when dt dx = 4 and x = 8? dt is, what is (a) The equation is x +y = 121. (b) = (Type an exact answer, using radicals as needed.) %3D dt
Angles in Circles
Angles within a circle are feasible to create with the help of different properties of the circle such as radii, tangents, and chords. The radius is the distance from the center of the circle to the circumference of the circle. A tangent is a line made perpendicular to the radius through its endpoint placed on the circle as well as the line drawn at right angles to a tangent across the point of contact when the circle passes through the center of the circle. The chord is a line segment with its endpoints on the circle. A secant line or secant is the infinite extension of the chord.
Arcs in Circles
A circular arc is the arc of a circle formed by two distinct points. It is a section or segment of the circumference of a circle. A straight line passing through the center connecting the two distinct ends of the arc is termed a semi-circular arc.
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