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WGU D128 Mathematics for Elementary Educators 2025/2026 OA Exam | 130 Questions & Detailed Answers

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Prepare for the WGU D128 Mathematics for Elementary Educators OA Exam with this comprehensive collection of 130 actual exam questions and detailed answers. This resource covers key mathematical concepts and problem-solving techniques essential for elementary educators, including geometry, measurement, probability, data analysis, and algebraic reasoning. Each question is paired with a clear, step-by-step solution to help reinforce understanding and ensure mastery of the material. Ideal for WGU students seeking to excel in their mathematics coursework and certification exams.

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WGU D128 MATHEMATICS FOR ELEMENTARY
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October 23, 2025
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2025/2026
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WGU D128 MATHEMATICS FOR ELEMENTARY 2025/2026 EDUCATORS
OA EXAM ACTUAL EXAM 130 QUESTIONS AND CORRECT DETAILED
ANSWERS|ALREADY GRADED A+
There are two weeks and three days remaining until the final exam. How many hours are
there until the exam? - ......ANSWER........408 hours



Triangle ABC is congruent with triangle DEF. Which of the following angles in DEF is
congruent to m< BCA in the first triangle? - ......ANSWER........< EFD




Two triangles are drawn in the coordinate plane. The vertices of the first triangle are (5, 4),
(−4, 6), (−8, 9). The vertices of the second triangle are (1, 6), (−8, 8), (x, y). Find the value of x
and y that allow these two triangles to be congruent. - ......ANSWER........(−12, 11)




What device would you use to measure the volume of a liquid?
- ......ANSWER........Graduated Cylinder




What is 15 in. in meters, given 1 in. equals 0.0254 m? - ......ANSWER........0.381 m



What is the approximate capacity of a spherical water tank with a radius of 7 ft?
- ......ANSWER........1,436 ft 3




What is the area of this figure? - ......ANSWER........63 square units

, 2 of 13


What is the length of the missing leg in a right triangle with a hypotenuse of 25 in. and a leg
of 9 in.? - ......ANSWER........4√34 in.




What is the surface area of a sphere with a diameter of 14 in.? - ......ANSWER........615.44 in
2



What is the triangle rotated 90 degrees about the origin? - ......ANSWER........The triangle
now sits in the upper left corner




What should a student use to measure the length and width of a textbook?
- ......ANSWER........Ruler




What type of graph is depicted? - ......ANSWER........box and whisker plot



Which of the following is a true statement based on the given histogram of black cherry
tree heights? - ......ANSWER........Black cherry trees have heights between 60 and 90 ft.




Which of the following terms would best describe the given data distribution? {40, 50, 60,
60, 60, 70, 70, 70, 70, 70, 70, 80, 80, 80, 90, 100} - ......ANSWER........symmetrical




Which of the following theorems proves that two figures are similar, but not congruent?
- ......ANSWER........Angle
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