Find a missing angle measure
The parts add up to the whole angle.
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An angle of 110° is split into two parts by a ray. One part measures 35°. What does the other part measure?
Answer: 75°
An angle of 70° is split into two parts by a ray. One part measures 15°. What does the other part measure?
Answer: 55°
An angle of 65° is split into two parts by a ray. One part measures 45°. What does the other part measure?
Answer: 20°
Tip: The parts add up to the whole angle.
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Up next
- Next in this topic Classify angles by their measure Grade 4
Curriculum
Common Core: 4.MD.C.7
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On paper: this skill is in the printable pack Grade 4 Common Core Math: Geometry and Measurement, with an answer key.
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