Grade 4 · MD
Angle Addition and Missing Angles
The whole angle equals the sum of its non-overlapping parts.
Grade 4Common Core 4.MD.C.7MDVerified correct ✓
Worked examples
Ray BD lies inside angle ABC. Angle ABD = 22° and angle DBC = 62°. What is the measure of angle ABC?
Answer: 84
Angle ABC measures 97°. Ray BD lies inside the angle so that angle ABD = 63°. What is the measure of angle DBC?
Answer: 34
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