Unit 5 Flashcards
According to Spencer, “A ____ represents a location in space or on a
drawing. It has no with, height or depth.”
Point
is the path of a moving point. A range has only one dimension – the
length. If the line has no precise length, it is an indefinite line bar . If the
endpoints are definite, the end is marked using a small cross.
Kind of lines
Straight line
Curved line
Mixed line
is a figure formed by two intersecting lines
Angle
6 Kind of angles
Right Angle
Acute angle
Straight angle
Obtuse angle
Reflex angle
Supplementary angle
It is an angle which is neither a right angle nor a straight angle.
Obtuse angle
is a closed plane figure bounded by three straight lines, not in
the same direction, and the sum of the interior angle is 180 degrees
Triangle
Kind of Triangles by sides
Equilateral triangles
Isosceles triangles
Scalene triangles
Triangles by angles
Right triangle
Obtuse triangle
Acute triangle
is polygon bounded by four sides. If
the opposite sides are parallel and equal, it is called a parallelogram.
Quadrilateral
Types of Quadrilateral?
Trapizoid
Trapezium
is a quadrilateral with both pairs of opposite sides parallel.
Parallelogram
Types of Parallelogram
Square
Rectangle
Rhombus
Rhomboid
A closed plane figure bounded by straight lines. If the sides and angles
of the polygon are equal, they are called regular polygons, and they can be inscribed in
or circumscribed around the circle.
Polygon
A closed plane curve containing all points of which have the same distance
from a fixed point within called center.
Circle
Is a geometric figure having three dimensions. It is bounded by planes
surfaces, while some are bounded with curve surfaces.
Solid
The shortest distance between two points. It is a line no part of
which is the curve.
Straight line
A line which no part is straight. This line continually
changes its direction. A ___or a ___ may enclose a portion of a
plane, but a straight line cannot.
Curve line
They are lines which are composed of broken lines and curve
lines
Mix line
These lines are straight, or curved lines may be identical if the distance
between them remains constant,
Parallel line
These lines make the right angle with one another. To indicate
the perpendicularity of lines in sketching they may mark with a box. The perpendicular
lines form 90 degrees
Perpendicular line
It is an angle formed by two
lines extending in the opposite direction from
the vertex to form a straight line. A straight line
is eaual to 180°.
Straight angle
It is an angle which is less than
90°.
Acute angle
A kind of angle which is greater
than 90° but smaller that straight angle.
Obtuse angle
If its measure is more 180°, but
less than 360°.
Reflex angle
These are angles
whose sum is equal to 180°.
Suplementary angle
is a triangle with
three equal sides.
Equilateral Triangle
is a triangle with two
sides equal and two angles similar. The two
equal sides are the legs, and the third is the
base.
Isosceles Triangle
has neither side nor
angle is equal.
Scalene Triangle
is a quadrilateral with only
one pair of sides parallel. The legs of a
trapezoid are the non-parallel sides.
Trapezoid
is a quadrilateral with no
sides parallel.
Trapezium
is a parallelogram with both pairs of
opposite sides parallel.
Square
is a parallelogram having four
sides equal and four right angle.
Rectangle
a parallelogram having four
sides equal and four right angle.
Rhombus
is a parallelogram with opposite
sides parallel but with no right angle.
Rhomboid
a polygon of 5 sides
Pentagon
a polygon of 6 sides
Hexagon
a polygon of 7 sides
Heptagon
a polygon of 8 sides
Octagon
a polygon of 9 sides
Nonagon
a polygon of 10 sides
Decagon
a polygon of 11 sides
Hendecagon
a polygon of 12 sides
Dodecagon
is the distance
around the circle
Circumference
is any part of the circle between two
of its points.
Arc
is a straight line drawn from the
center to any point on a circle.
Radius
is a straight line drawn
through the center of a circle.
Diameter
is a chord extended so that it
intersects the circle. It is the infinite line
extension of a chord.
Secant
is an angle whose vertex
is at the center of the circle and whose
sides are the radii.
Central angle
is a straight line having one
point in common with the circle.
Tangent
an arc equal to one-half
of the circle. It contains 180 degrees.
Semi-cricle
is an arc of 90 degrees. It
is equal to one-fourth of the circle.
Quadrant
is a part of a figure cut off
by a line or plane intersecting it, in
particular.
Segment
is a straight-line segment
whose endpoints both lie on the
circle
Chord
is a “pie-slice” part of
a circle -the area between two
radiuses and the connecting arc of a
circle.
Sector
it has two bases, which are
parallel polygons and three or more lateral
surfaces, which are parallelograms.
Prism
has polygon for its base, and
the triangular lateral surfaces are
intersecting at a common point called the
vertex.
Pyramid
a solid generated by a
straight line called the generatrix moving in
contact with a curved line and always
remain parallel to its previous position to
the axis.
Cylinder
a solid generated by a circle
revolving about one of its diameters.
Spheres
-a solid generated by a circle (or
another curve revolving about an axis
which is eccentric to the curve).
Torus
The plane cuts the cone
perpendicular to the axis.
Circle
The plane cuts cone oblique to
the axis gut making a greater
angle
Ellipse
The plane cuts cone obliquely to
the axis and making the same
angle with the axis
Parabola
The plane cuts cone, making a
smaller angle with the axis.
Hyperbola
