WGU D127 - Mathematics for Elementary
Educators III Questions with 100% Correct
Answers
line
A straight one-dimensional figure that extends infinitely in both directions.
perpendicular
Describes lines intersecting each other to form a 90 degree, or right, angle.
circle
The set of all points that are equidistant from a point.
radius
The distance from the center of a circle or sphere to any point on the outer edge.
isosceles trapezoid
Quadrilateral with one pair of parallel opposite sides (the bases) and another pair of equal
opposite sides.
interior angle
An angle inside a shape between two joined sides.
square
A quadrilateral with four equal sides and four 90° angles.
regular polygon
A polygon with equal sides and equal angles.
,central angle
Shape formed when 2 lines or rays meet with vertex meets only the center point of the circle.
hypotenuse
The largest side of a right triangle, opposite the right angle. Only right triangles have a
hypotenuse.
kite
Quadrilateral with two sets of adjacent equal sides and one set of equal opposite angles.
reflex angle
Angles greater than 180°.
vertical line
A line that runs up and down on the coordinate plane, parallel to the y-axis. It has no run, or
change in x-value.
parallel
Two lines, line segments, rays, or planes that are the same distance from one another and
never intersect.
trapezoid
Quadrilateral with one pair of parallel opposite sides.
bisect
To divide into two equal parts.
isosceles triangle
, A triangle with two equal sides and two equal corresponding angles.
angle
The amount of rotation (often measured in degrees) needed to make one line segment, ray, or
line identical with another line segment, ray, or line.
inscribed angles
Shape formed when 2 lines or rays meet with a vertex that meets the circumference of a
circle.
vertex
A point where two line segments meet to form an angle.
irregular polygon
A polygon whose sides are not all equal and whose angles have different measures.
straight angle
An angle that measures 180 degrees.
line segment
Shortest distance between two points; completely straight with two endpoints.
rectangle
Quadrilateral with four right angles, equal opposite sides, and two sets of parallel opposite
sides.
sector
A portion of a circle defined by two radii and an intercepted arc.
Educators III Questions with 100% Correct
Answers
line
A straight one-dimensional figure that extends infinitely in both directions.
perpendicular
Describes lines intersecting each other to form a 90 degree, or right, angle.
circle
The set of all points that are equidistant from a point.
radius
The distance from the center of a circle or sphere to any point on the outer edge.
isosceles trapezoid
Quadrilateral with one pair of parallel opposite sides (the bases) and another pair of equal
opposite sides.
interior angle
An angle inside a shape between two joined sides.
square
A quadrilateral with four equal sides and four 90° angles.
regular polygon
A polygon with equal sides and equal angles.
,central angle
Shape formed when 2 lines or rays meet with vertex meets only the center point of the circle.
hypotenuse
The largest side of a right triangle, opposite the right angle. Only right triangles have a
hypotenuse.
kite
Quadrilateral with two sets of adjacent equal sides and one set of equal opposite angles.
reflex angle
Angles greater than 180°.
vertical line
A line that runs up and down on the coordinate plane, parallel to the y-axis. It has no run, or
change in x-value.
parallel
Two lines, line segments, rays, or planes that are the same distance from one another and
never intersect.
trapezoid
Quadrilateral with one pair of parallel opposite sides.
bisect
To divide into two equal parts.
isosceles triangle
, A triangle with two equal sides and two equal corresponding angles.
angle
The amount of rotation (often measured in degrees) needed to make one line segment, ray, or
line identical with another line segment, ray, or line.
inscribed angles
Shape formed when 2 lines or rays meet with a vertex that meets the circumference of a
circle.
vertex
A point where two line segments meet to form an angle.
irregular polygon
A polygon whose sides are not all equal and whose angles have different measures.
straight angle
An angle that measures 180 degrees.
line segment
Shortest distance between two points; completely straight with two endpoints.
rectangle
Quadrilateral with four right angles, equal opposite sides, and two sets of parallel opposite
sides.
sector
A portion of a circle defined by two radii and an intercepted arc.
