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