WGU D127 - Mathematics for
Elementary Educators III Questions and
Answers Graded A+
line - Correct answer-A straight one-dimensional figure that extends infinitely in
both directions.
perpendicular - Correct answer-Describes lines intersecting each other to form a 90
degree, or right, angle.
circle - Correct answer-The set of all points that are equidistant from a point.
radius - Correct answer-The distance from the center of a circle or sphere to any
point on the outer edge.
isosceles trapezoid - Correct answer-Quadrilateral with one pair of parallel
opposite sides (the bases) and another pair of equal opposite sides.
interior angle - Correct answer-An angle inside a shape between two joined sides.
square - Correct answer-A quadrilateral with four equal sides and four 90° angles.
regular polygon - Correct answer-A polygon with equal sides and equal angles.
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,central angle - Correct answer-Shape formed when 2 lines or rays meet with vertex
meets only the center point of the circle.
hypotenuse - Correct answer-The largest side of a right triangle, opposite the right
angle. Only right triangles have a hypotenuse.
kite - Correct answer-Quadrilateral with two sets of adjacent equal sides and one
set of equal opposite angles.
reflex angle - Correct answer-Angles greater than 180°.
vertical line - Correct answer-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 - Correct answer-Two lines, line segments, rays, or planes that are the same
distance from one another and never intersect.
trapezoid - Correct answer-Quadrilateral with one pair of parallel opposite sides.
bisect - Correct answer-To divide into two equal parts.
isosceles triangle - Correct answer-A triangle with two equal sides and two equal
corresponding angles.
angle - Correct answer-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.
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, inscribed angles - Correct answer-Shape formed when 2 lines or rays meet with a
vertex that meets the circumference of a circle.
vertex - Correct answer-A point where two line segments meet to form an angle.
irregular polygon - Correct answer-A polygon whose sides are not all equal and
whose angles have different measures.
straight angle - Correct answer-An angle that measures 180 degrees.
line segment - Correct answer-Shortest distance between two points; completely
straight with two endpoints.
rectangle - Correct answer-Quadrilateral with four right angles, equal opposite
sides, and two sets of parallel opposite sides.
sector - Correct answer-A portion of a circle defined by two radii and an
intercepted arc.
triangle inequality theorem - Correct answer-For every triangle, the sum of any two
sides is always greater than the third side.
parallelogram - Correct answer-Quadrilateral with opposite, parallel, equal sides
and equal opposite angles.
ray - Correct answer-A line with a single endpoint (or point of origin) that extends
infinitely in the other direction.
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Elementary Educators III Questions and
Answers Graded A+
line - Correct answer-A straight one-dimensional figure that extends infinitely in
both directions.
perpendicular - Correct answer-Describes lines intersecting each other to form a 90
degree, or right, angle.
circle - Correct answer-The set of all points that are equidistant from a point.
radius - Correct answer-The distance from the center of a circle or sphere to any
point on the outer edge.
isosceles trapezoid - Correct answer-Quadrilateral with one pair of parallel
opposite sides (the bases) and another pair of equal opposite sides.
interior angle - Correct answer-An angle inside a shape between two joined sides.
square - Correct answer-A quadrilateral with four equal sides and four 90° angles.
regular polygon - Correct answer-A polygon with equal sides and equal angles.
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,central angle - Correct answer-Shape formed when 2 lines or rays meet with vertex
meets only the center point of the circle.
hypotenuse - Correct answer-The largest side of a right triangle, opposite the right
angle. Only right triangles have a hypotenuse.
kite - Correct answer-Quadrilateral with two sets of adjacent equal sides and one
set of equal opposite angles.
reflex angle - Correct answer-Angles greater than 180°.
vertical line - Correct answer-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 - Correct answer-Two lines, line segments, rays, or planes that are the same
distance from one another and never intersect.
trapezoid - Correct answer-Quadrilateral with one pair of parallel opposite sides.
bisect - Correct answer-To divide into two equal parts.
isosceles triangle - Correct answer-A triangle with two equal sides and two equal
corresponding angles.
angle - Correct answer-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.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
, inscribed angles - Correct answer-Shape formed when 2 lines or rays meet with a
vertex that meets the circumference of a circle.
vertex - Correct answer-A point where two line segments meet to form an angle.
irregular polygon - Correct answer-A polygon whose sides are not all equal and
whose angles have different measures.
straight angle - Correct answer-An angle that measures 180 degrees.
line segment - Correct answer-Shortest distance between two points; completely
straight with two endpoints.
rectangle - Correct answer-Quadrilateral with four right angles, equal opposite
sides, and two sets of parallel opposite sides.
sector - Correct answer-A portion of a circle defined by two radii and an
intercepted arc.
triangle inequality theorem - Correct answer-For every triangle, the sum of any two
sides is always greater than the third side.
parallelogram - Correct answer-Quadrilateral with opposite, parallel, equal sides
and equal opposite angles.
ray - Correct answer-A line with a single endpoint (or point of origin) that extends
infinitely in the other direction.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
