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Build original SVG elements

About 35 minutes · 7 reading + 28 practice and checks
Time includes reading, practice, and questions. Extra videos or further study are optional.
See this course’s project requirements

An original 8–12-second three-stage SVG/CSS explanation with deliberate timing, readable title states, pause and reduced-motion alternatives, source and storyboard.

Keep your working files in your own notebook or software. Save a private description, checklist, and work link in My Proof.

What to include

  • Create a three-stage explanatory storyboard and original SVG.
  • Record actual duration/keyframe percentage times.
  • Keep geometry, labels and static text consistent.
  • Supply manual play/pause/static and reduced-motion rules.
  • Deliver fresh HTML with actual source/browser test evidence and limits.

Review and revise

Use these criteria to check your work and choose what to improve.

  • Meaning: stages serve a stated relationship.
  • Geometry/timing: coordinates and percentages agree.
  • Control: pause/static meaning work where actually tested.
  • Evidence: fresh artifact and separate source/interaction claims.
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Before you begin

The idea in everyday life

Use simple circles and a path; no downloaded icon or generated bitmap is needed. SVG circle coordinates name the center and radius, while the path lists edge endpoints. Keep the visible labels and title/description synchronized. A viewBox defines the coordinate system independently of displayed width.

The idea

Vector geometry should carry the explanation.

Follow along

Build original SVG elements — worked practice

Vector geometry should carry the explanation.

Original viewBox 0 0 480 230; A(80, 160), B(240, 40), C(400, 160); each radius 12. Path M80 160 L240 40 L400 160 Z returns to A. B is shifted upward relative to A/C; the points are noncollinear. SVG title/desc states the same relationship, and nearby visible labels A/B/C do not depend on color alone.

  1. 1. 2.1 Build

    Open motion.html or create the supplied SVG geometry. Match each circle center to its A/B/C label.

    You should see: Centers/labels agree.

  2. 2. 2.2 Build

    Trace the path’s start, two line endpoints and closing Z. Check that no edge stops at a different coordinate.

    You should see: The path closes C to A.

  3. 3. 2.3 Build

    Write a concise SVG title/description and a visible static list; describe the geometry rather than only “nice graphic”.

    You should see: Text states the same meaning.

  4. 4. 2.4 Build

    Move B to x 240/y80 in a copy. Update the geometry and description if needed, then inspect the actual rendered bounds.

    You should see: The changed B still creates noncollinear geometry and fits the viewBox.

Now change one thing

In a changed SVG, point B moves to cx=240, cy=80. Which vertical coordinate must its path endpoint use to meet that center?

Your work

What to finish

An original SVG with coordinate/description checks.

Common mistake

Watch for this

Changing a circle while leaving its connecting path at the old coordinate.

How can I tell I understand it?

You can trace the exact points and edges in source and render.

Try 3 questions

Quick knowledge check

Answer all 3 questions. Get at least 2 right and the lesson completes automatically.

Not yet passed

You’ll get an explanation for each answer. Signed in? Your results save to your account.

1What does Z do at the end of the supplied path?
2B’s circle moves from y 40 to y 80. Which dependency must be checked?
3Why retain A/B/C labels as well as color?
0 of 3 answeredApply the lesson to a short question, then review the explanation.
2
Finish this lesson

Pass the check. We’ll save the progress.

Answer all 3 questions above and get at least 2 right. You can review the explanations and try again.

Go to the knowledge check
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Sources and further reading

Explore the references behind this lesson.

MDN: SVG Basic Shapes
Source & access notes · checked 2026-10-01

Read actual circle center/radius, rect and line coordinate controls after canonical redirect; original figures/code supplied.

Access: Public page text or PDF was opened and read through the web reader on 2026-10-01; no signup required for reading.

Reuse: Linked for further study. All LifeStarter scenarios, samples, assets and assessments are original; no source exercises or artwork are copied.

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