Ivy Waters International Standards · G4.M-03
Version 2.2.0 · 2026 · © 2026 Ivy Waters International. Licensed under CC BY 4.0.
Ages are the anchor. Grade names are Ivy Waters stage labels for this framework, not a claim about any national school system.
Mathematics & Quantitative Reasoning
Your child can identify acute, obtuse, and right angles, and can use a standard physical protractor to measure degrees (°) accurately on geometric plans.
In real life
Your child holds a protractor against a bridge drawing, measures a support at about 45°, and says, "That one is acute because it's smaller than a right angle."
Standards are permanent: an ID issued in this edition keeps pointing at the same standard. Cite it like this.
Ivy Waters International Standards v2.2.0 (2026). Standard G4.M-03: Angular Measurement & Geometric Principles. https://ivywaters.com/standards/G4.M-03
Ages are the anchor. Grade names are Ivy Waters stage labels for this framework, not a claim about any national school system.
A machine-readable CC BY 4.0 release is published for reuse and integration. Schools and tools may display, adapt, and map their own records against it with attribution.
Ivy Waters International Standards · Version 2.2.0 · 2026 · © 2026 Ivy Waters International. Licensed under CC BY 4.0.
