WGU D128 MATHEMATICS FOR
ELEMENTARY EDUCATORS OA FINAL
STUDY SHEET 2026 SOLVED QUESTIONS
FULLY CORRECT
⫸ Irregular Polygon Answer: A polygon whose sides are not all equal
and whose angles have different measures
⫸ Central Angle Answer: Shape formed when 2 lines of rays meet with
vertex; only at the center point of the circle
⫸ Legs Answer: The sides of a right triangle not opposite the right
angle
⫸ Isosceles triangle Answer: A triangle with two equal sides and two
equal corresponding angles
⫸ Center Answer: The point from which all the points on a circle are
equidistant
⫸ Pentagon Answer: A polygon with 5 sides and 5 angles
,⫸ Bisect Answer: To divide into two equal parts
⫸ Square Answer: A quadrilateral with four equal sides and four 90
degree angles
⫸ Diameter Answer: The distance from one side of a circle to the other
side that passes through the center point
⫸ Vertical Line Answer: A line that runs up and down on the coordinate
plane, parallel to the y-axis
⫸ Parallelogram Answer: Quadrilateral with opposite, parallel, equal
sides and equal opposite angles
⫸ Y-axis Answer: The vertical line that passes through the origin on a
coordinate plane
⫸ Equilateral triangle Answer: A triangle with three equal sides and
three angles of 60 degrees each
⫸ Regular polygon Answer: A polygon with equal sides and equal
angles
⫸ Degrees Answer: The units in which angles are measured
, ⫸ Perpendicular Answer: Describes lines intersecting each other to
form a 90 degree or right angle
⫸ Coordinate plane Answer: A tool used for graphing that is a display
of a two dimensional plane
⫸ Vertex Answer: A point where two line segments meet to form an
angle
⫸ Trapezoid Answer: Quadrilateral with one pair of parallel opposite
sides
⫸ Parallel Answer: Two lines, line segments, rays or planes that are the
same distance from one another and never intersect
⫸ Right angle Answer: An angle of 90 degrees
⫸ Supplementary angles Answer: Two angles whose sum is equal to
180 degrees
⫸ Ray Answer: A line with a single endpoint that extends infinitely in
the other direction
⫸ Quadrilateral Answer: A flat shape with four straight sides and four
angles
ELEMENTARY EDUCATORS OA FINAL
STUDY SHEET 2026 SOLVED QUESTIONS
FULLY CORRECT
⫸ Irregular Polygon Answer: A polygon whose sides are not all equal
and whose angles have different measures
⫸ Central Angle Answer: Shape formed when 2 lines of rays meet with
vertex; only at the center point of the circle
⫸ Legs Answer: The sides of a right triangle not opposite the right
angle
⫸ Isosceles triangle Answer: A triangle with two equal sides and two
equal corresponding angles
⫸ Center Answer: The point from which all the points on a circle are
equidistant
⫸ Pentagon Answer: A polygon with 5 sides and 5 angles
,⫸ Bisect Answer: To divide into two equal parts
⫸ Square Answer: A quadrilateral with four equal sides and four 90
degree angles
⫸ Diameter Answer: The distance from one side of a circle to the other
side that passes through the center point
⫸ Vertical Line Answer: A line that runs up and down on the coordinate
plane, parallel to the y-axis
⫸ Parallelogram Answer: Quadrilateral with opposite, parallel, equal
sides and equal opposite angles
⫸ Y-axis Answer: The vertical line that passes through the origin on a
coordinate plane
⫸ Equilateral triangle Answer: A triangle with three equal sides and
three angles of 60 degrees each
⫸ Regular polygon Answer: A polygon with equal sides and equal
angles
⫸ Degrees Answer: The units in which angles are measured
, ⫸ Perpendicular Answer: Describes lines intersecting each other to
form a 90 degree or right angle
⫸ Coordinate plane Answer: A tool used for graphing that is a display
of a two dimensional plane
⫸ Vertex Answer: A point where two line segments meet to form an
angle
⫸ Trapezoid Answer: Quadrilateral with one pair of parallel opposite
sides
⫸ Parallel Answer: Two lines, line segments, rays or planes that are the
same distance from one another and never intersect
⫸ Right angle Answer: An angle of 90 degrees
⫸ Supplementary angles Answer: Two angles whose sum is equal to
180 degrees
⫸ Ray Answer: A line with a single endpoint that extends infinitely in
the other direction
⫸ Quadrilateral Answer: A flat shape with four straight sides and four
angles
