WGU D128 2026 EXAM REVIEW PACK FULLY SOLVED QUESTIONS

WGU D128 2026 EXAM REVIEW PACK
FULLY SOLVED QUESTIONS


◉Circumference of a circle. Answer: C=2πr or C=πd


◉area. Answer: The space inside the shape


◉Area of a circle. Answer: A=πr²


◉Arcs. Answer: a part of the circumference of a circle.


◉sector. Answer: The part of a circle that looks like a piece of pie. A
sector is bounded by 2 radii and an arc of the circle.


◉Solving for angles and arcs. Answer: Central angle/360•=arc
length/2πr= area
of sector/πr²


◉central angle. Answer: Vertices are on the center of the circle


◉inscribed angle. Answer: an angle whose vertex is on the circle

, ◉Transformation. Answer: How figures can transform on the plane
to make other figures.


◉reflextion. Answer: flipped


◉Prime. Answer: Mark on original vertices


◉Rotation. Answer: Movement around a fixed point


◉Dialation. Answer: A transformation that enlarges or reduces a
figure by a scale factor.


◉Distance Formula. Answer: d = √[( x₂ - x₁)² + (y₂ - y₁)²]


◉Inscribed Angle Theorem. Answer: 1/2 intercepted arc


◉Scale Factor of Dilation Formula. Answer: New length/old length


◉line of reflection. Answer: A line that a figure is flipped across to
create a mirror image of the original figure