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Answered

(Will mark brainliest) Please help as soon as possible for 30 points

Will Mark Brainliest Please Help As Soon As Possible For 30 Points class=

Answer :

Answer:

90

Step-by-step explanation:

a triangle's angles all add up to 180. take 51 and 39 away from 180 and you get 90

Answer: 90 degrees

Step-by-step explanation:

Theorem:

a+b+c=180 degrees

39 degrees + 51 degrees + x degrees = 180 degrees

39 + 51 = 90

180 - 90 = 90

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