Worksheet directions

Grade 4 • Independent Practice • Work on your own. Show your calculations or reasoning where needed.

Sample questions

1. A 180° angle is split into adjacent, non-overlapping parts. One is 75°. Find the other. Write an equation with x. Equation: ___ x = ___ degrees
2. A 90° angle is split into adjacent, non-overlapping parts. One is 25°. Find the other. Write an equation with x. Equation: ___ x = ___ degrees
3. A 160° angle is split into adjacent, non-overlapping parts. One is 85°. Find the other. Write an equation with x. Equation: ___ x = ___ degrees
4. A 140° angle is split into adjacent, non-overlapping parts. One is 50°. Find the other. Write an equation with x. Equation: ___ x = ___ degrees
5. A 180° angle is split into adjacent, non-overlapping parts. One is 110°. Find the other. Write an equation with x. Equation: ___ x = ___ degrees
6. A 130° angle is split into adjacent, non-overlapping parts. One is 40°. Find the other. Write an equation with x. Equation: ___ x = ___ degrees

See the preview for diagrams, answer spaces, and the complete layout.

Common Core connections

Source labels: 4.MD.C.7. Review the learning goals below to check the fit for your class.

• 4.MD.C.7 — Use angle addition to find unknown angles

Bring it into your lesson

Open this worksheet in Sparkclass to copy it to your Files. Check the resulting layout before sharing it with students.