Big Ideas Math Geometry, 2014
BI
Big Ideas Math Geometry, 2014 View details
5. Measuring and Constructing Angles
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Exercise 18 Page 44

How many markings does ∠ EAD have?

∠ ADB
∠ DBC

Practice makes perfect
Let's copy the diagram and include the fact that ∠ AED=34^(∘) and ∠ EAD=112^(∘).

Any angle with the same number of markings as ∠ EAD is going to be congruent. Examining the diagram, we can identify two such angles: ∠ ADB and ∠ DBC.