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