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26-02-2021
Mathematics

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What is the measure of ZDEF? ○ 25° ○ 75° ○ 90° ○ 105°

What is the measure of ZDEF 25 75 90 105 class=

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sqdancefan sqdancefan

26-02-2021

9514 1404 393

Answer:

(d) 105°

Step-by-step explanation:

The sum of angles in a triangle is 180°.

28° + ∠DEF + 47° = 180°

∠DEF = 105° . . . . . . . . . . . subtract 75°, collect terms

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