Applied investigation · Unit 04

Coordinate Street-Grid Proof & Design

How do angle relationships and coordinate methods prove direction, alignment, and perpendicularity?

Design brief

Create a geometric investigation or design that demonstrates the unit relationships in a form another learner can inspect, reproduce, and challenge.

State the question, audience, constraints, units, and success criteria.
Create a labeled planning sketch or construction.
Show at least three mathematical relationships from the unit.
Verify one result using a second method, digital tool, construction, or measurement.
Explain assumptions, precision, limitations, and one revision.
Submit a printable one- to three-page portfolio with source files or exports when applicable.

Evidence	4 · Advanced	3 · Proficient	2 · Developing	1 · Beginning
Geometry	Accurate, connected, generalized	Accurate and complete	Partially accurate	Major gaps
Reasoning	Proof and validation are compelling	Methods are justified	Some justification	Unsupported result
Visual clarity	Technical, accessible, print-ready	Clear labels and units	Some unclear elements	Hard to interpret
Reflection	Sensitivity and revision analyzed	Limits and revision stated	Brief reflection	No meaningful reflection