No.8 (MESL)

The great circles through the north and south celestial poles are called

• hour circles

• celestial meridians

• elevated poles

• a and b

An oblique equilateral parallelogram:

• square

• rectangle

• rhombus

• trapezoid

mil is a unit of

• angle

• length

• angle and length

• weight

An annulus is a plane figure which is composed of two concentric circles. The area of the annulus can be calculated by getting the difference between the area of the larger circle and the area of the smaller circle. Also, its area can be calculated by removing the hole. This method is called

• law of extremities

• law of reduction

• law of deduction

• sharp theorem

Each of the faces of a regular hexahedron is a

• square

• triangle

• rectangle

• hexagon

It is a polyhedron of which two faces are equal polygons in parallel planes and the other faces are parallelogram

• tetrahedron

• prism

• frustum

• prismatoid

The apothem of a polygon is ___ of its inscribed circle.

• radius

• circumference

• diameter

• length

Each angle of regular dodecagon is equal to

• 135°

• 150°

• 125°

• 105°

The area bounded by two concentric circles is called

• ring

• disk

• annulus

• sector

One-fourth of a great circle is called

• cone

• sector

• quadrant

• arc