A bay is a recessed, coastal body of water that directly connects to a larger main body of water, such as an ocean , a lake , or another bay. A large bay is usually called a gulf , sea , sound , or bight . A cove is a small, circular bay with a narrow entrance. A fjord is an elongated bay formed by glacial action. The term embayment is also used for related features , such as extinct bays or freshwater environments.
16-549: Hilo Bay is a large bay located on the eastern coast of the island of Hawaiʻi . The modern town of Hilo, Hawaii overlooks Hilo Bay, located at 19°44′10″N 155°4′37″W / 19.73611°N 155.07694°W / 19.73611; -155.07694 . North of the bay runs the Hamakua Coast on the slopes of Mauna Kea , and south of the bay is the Puna district on the slopes of Mauna Loa . The area just inland from
32-465: A and b , and then connecting their common endpoint to the semicircle with a segment perpendicular to the diameter. The length of the resulting segment is the geometric mean. This can be proven by applying the Pythagorean theorem to three similar right triangles, each having as vertices the point where the perpendicular touches the semicircle and two of the three endpoints of the segments of lengths
48-477: A and b . The construction of the geometric mean can be used to transform any rectangle into a square of the same area, a problem called the quadrature of a rectangle. The side length of the square is the geometric mean of the side lengths of the rectangle. More generally, it is used as a lemma in a general method for transforming any polygonal shape into a similar copy of itself with the area of any other given polygonal shape. The Farey sequence of order n
64-402: A semicircle is a one-dimensional locus of points that forms half of a circle . It is a circular arc that measures 180° (equivalently, π radians , or a half-turn ). It only has one line of symmetry ( reflection symmetry ). In non-technical usage, the term "semicircle" is sometimes used to refer to either a closed curve that also includes the diameter segment from one end of the arc to
80-441: A bay often reduces the strength of winds and blocks waves . Bays may have as wide a variety of shoreline characteristics as other shorelines. In some cases, bays have beaches , which "are usually characterized by a steep upper foreshore with a broad, flat fronting terrace". Bays were significant in the history of human settlement because they provided easy access to marine resources like fisheries . Later they were important in
96-453: A bay unless its area is as large as (or larger than) that of the semi-circle whose diameter is a line drawn across the mouth of that indentation — otherwise it would be referred to as a bight . There are various ways in which bays can form. The largest bays have developed through plate tectonics . As the super-continent Pangaea broke up along curved and indented fault lines, the continents moved apart and left large bays; these include
112-423: Is the sequence of completely reduced fractions which when in lowest terms have denominators less than or equal to n , arranged in order of increasing size. With a restricted definition, each Farey sequence starts with the value 0, denoted by the fraction 0 / 1 , and ends with the fraction 1 / 1 . Ford circles can be constructed tangent to their neighbours, and to
128-781: The Aleutian Islands . The April 1, 1946, tsunami from the 1946 Aleutian Islands earthquake killed by between 165 and 173 people in Hilo Bay. On May 23, 1960, a tsunami originating from the 1960 Valdivia earthquake in Chile (the most powerful earthquake ever recorded) killed 61 people in Hilo. After the February 27, 2010 Chile earthquake , the effectiveness of the Pacific Tsunami Warning Center (PTWC)
144-581: The Gulf of Guinea , the Gulf of Mexico , and the Bay of Bengal , which is the world's largest bay. Bays also form through coastal erosion by rivers and glaciers . A bay formed by a glacier is a fjord . Rias are created by rivers and are characterised by more gradual slopes. Deposits of softer rocks erode more rapidly, forming bays, while harder rocks erode less quickly, leaving headlands . Semi-circle In mathematics (and more specifically geometry ),
160-597: The bay is the Hilo district , divided into north and south Hilo within the County of Hawaii . Banyan Drive runs through Liliʻuokalani Gardens near downtown Hilo at the edge of the bay. The ancient Hawaiian name for the village on the bay was Waiākea . After being surveyed in 1825 by Charles Robert Malden of HMS Blonde , it was called Byron's Bay for captain George Byron, 7th Baron Byron . The coral reef on
176-432: The center of the circle containing the given semicircle. A semicircle can be used to construct the arithmetic and geometric means of two lengths using straight-edge and compass. For a semicircle with a diameter of a + b , the length of its radius is the arithmetic mean of a and b (since the radius is half of the diameter). The geometric mean can be found by dividing the diameter into two segments of lengths
SECTION 10
#1732773337863192-527: The development of sea trade as the safe anchorage they provide encouraged their selection as ports . The United Nations Convention on the Law of the Sea defines a bay as a well-marked indentation in the coastline, whose penetration is in such proportion to the width of its mouth as to contain land-locked waters and constitute more than a mere curvature of the coast. An indentation, however, shall not be regarded as
208-567: The eastern side of the bay is called Blonde Reef for the ship. The first breakwater across the bay was first started in 1908 under contract to Engineer Delbert Metzger. It was extended in 1911, and completed in 1929. The small island Moku Ola (now called Coconut Island) was the site of an ancient temple dedicated to healing. Hilo Bay is sometimes called "the tsunami capital of the United States". The bay's topography steers tsunamis to Hilo from earthquakes in active areas such as Chile and
224-443: The other or to the half- disk , which is a two-dimensional geometric region that further includes all the interior points. By Thales' theorem , any triangle inscribed in a semicircle with a vertex at each of the endpoints of the semicircle and the third vertex elsewhere on the semicircle is a right triangle , with a right angle at the third vertex. All lines intersecting the semicircle perpendicularly are concurrent at
240-401: The x-axis at these points. Semicircles joining adjacent points on the x-axis pass through the points of contact at right angles. The equation of a semicircle with midpoint ( x 0 , y 0 ) {\displaystyle (x_{0},y_{0})} on the diameter between its endpoints and which is entirely concave from below is If it is entirely concave from above,
256-596: Was shown, as no one was injured on Hilo Bay after the (PTWC) sirens sounded and evacuations were ordered. Bay A bay can be the estuary of a river, such as the Chesapeake Bay , an estuary of the Susquehanna River . Bays may also be nested within each other; for example, James Bay is an arm of Hudson Bay in northeastern Canada . Some large bays, such as the Bay of Bengal and Hudson Bay, have varied marine geology . The land surrounding
#862137