Study Guide — 1.G.A.1

Distinguish between defining attributes (e

Draw and model shapes and partitions in the plane.

What this standard means

• Distinguish between defining attributes (e.g., triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size); build and draw shapes to possess defining attributes.
• Apply distinguish between defining attributes (e with models and explanation
• Draws shapes with defining attributes

_See printable PDF for diagram._

How to use the 20 practice sets

| Sets | When to use | | --- | --- | | 1–5 | Intro — explore together, short written items | | 6–10 | Core skills — diagrams and written practice | | 11–15 | Mixed review — explain thinking | | 16–20 | Stretch — word problems and mastery tasks |

Pacing: 10–15 minutes per session.

How to practice

1. Use a ruler for straight sides when possible 2. Partition rectangles into equal parts 3. Label equal shares

_See printable PDF for diagram._

Common mistakes

• Unequal partitions
• Wrong number of parts

Review and practice tests

1. Start Review 1/10 when sets 1–3 feel comfortable. 2. Move up one review level with little help. 3. Use Practice Test 4/10–6/10 for mid-standard checks. 4. Practice Test 10/10 is the mastery bar for 1.G.A.1.

• [ ] Draws shapes with defining attributes
• [ ] Partitions figures equally
• [ ] Labels parts correctly

Materials for this standard

• Practice Problems — 20 printable sets
• Review — 10 difficulty levels
• Practice Test — 10 difficulty levels
• Answer key — for parents and tutors