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Tresset [83]
3 years ago
10

Please help me! Will give brainlst :)

Mathematics
1 answer:
tigry1 [53]3 years ago
3 0

Answer:

9. the measure of DEF is 103°

10. the measure of DEG is 77°

11. 90°

Step-by-step explanation:

it's pretty simple, just take into consideration that the final measure of all the angles of a triangle must be 180°

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Step-by-step explanation:

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monitta
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