SOLUTION: Unit 1 Angle Addition Postulate Geometry Basics ... - Free Printable

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- The vertex of ∠4 is B.
- The sides of ∠1 are BE and BC.
- Another name for ∠5 is ∠EBD.
- ∠FBC is 90°, ∠EBF is 90°, and ∠ABC is 180°.
- An angle bisector is DBF.
- If m∠EBD = 36° and m∠DBC = 108°, then m∠EBC = 36°.
- If m∠EBF = 117°, then m∠ABE = 36°.
- For problem 2, x = 6.
- For problem 3, x = 5, so m∠EFH = 26°, m∠HFG = 62°, and m∠EFG = 88°.
- For problem 4, x = 14, so m∠ABD = 125°, m∠DBC = 55°, and m∠ABC = 180°.
- For problem 5, x = 7, so m∠MNO = 40°, m∠ONP = 50°, and m∠MNP = 90°.

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