WGU D128 Objective Assessment (Latest
2024/ 2025) Mathematics for Elementary
Educators Exam| Questions and Verified
Answers| 100% Correct| Grade A
Sum of a polygon - ANSWER (n-2)180
Right angle - ANSWER 90 degrees
acute angle - ANSWER less than 90 degrees
obtuse angle - ANSWER greater than 90 degrees and less than 180 degrees
reflex angle - ANSWER greater than 180 degrees
complementary angles - ANSWER Two angles whose sum is 90 degrees
supplementary angles - ANSWER Two angles whose sum is 180 degrees
interior angles of a polygon - ANSWER angles inside of a polygon
triangle - ANSWER A polygon with three sides whose interior angles equal
180. isosceles triangle - ANSWER A triangle that has 2 equal sides.
equilateral triangle - ANSWER a triangle with 3 equal sides (60 degrees)
Triangle Inequality Theorem - ANSWER The sum of the lengths of any two sides of a triangle must be greater than the length of the third side
scalene triangle - ANSWER no equal sides
quadrilateral - ANSWER a four-sided polygon with interior angles adding to 360 degrees
Parallelogram - ANSWER A quadrilateral with two pairs of parallel sides
square - ANSWER A quadrilateral with 4 sides that are equal and has all 90
degree angles
rectangle - ANSWER a parallelogram with 4 right angles
Rhombus - ANSWER A parallelogram with four congruent sides.
Trapezoid - ANSWER A quadrilateral with exactly one pair of parallel sides
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