Unit 2: Geometry
Target 144.MD.C.7Ch 11: Target 3
I can use addition and subtraction to find unknown angle measures.
Standard cap: 4 - Solve multi-step angle relationships and justify the reasoning.
Subskills what students must be able to do
- 1I can combine adjacent angles to find a total.
- 2I can use known totals such as 90° or 180°.
- 3I can find an unknown angle using addition or subtraction.
Proficiency Scale & ⚓️ Tasks
1 → 4 proficiency scale
1Beginning
“Two adjacent angles are 20° and 30°. What is the total?”
2Developing
“A right angle is split into 35° and x°. What whole are you working from?”
3Proficient
“Find x and show an equation that represents the angle relationship.”
4Advanced
“Find two unknown angles in this multi-part diagram and explain how the relationships connect.”
Pre-Test
Check what students already know2Teach
Lessons and videos that introduce the skill6Engage NY Lesson (3)
Engage NY Lesson
Lesson 10 — Addition of adjacent angle measures
Grade 4 · Module 4 · Topic C · Lesson 10
Engage NY
Engage NY Lesson
Lesson 11 — Addition of adjacent angle measures (continued)
Grade 4 · Module 4 · Topic C · Lesson 11
Engage NY
Engage NY Lesson
Lesson 9 — Decompose angles
Grade 4 · Module 4 · Topic C · Lesson 9
Engage NY