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BartSMP [9]
2 years ago
3

PLEASEE HELP ME AND I WILL GIVE YOU BRAINLIEST PLEASEEEEE!!!!!!!!

Mathematics
1 answer:
iris [78.8K]2 years ago
4 0
All the addition of angles in quadrilateral is 360

360=90+80+5x+4x+10

360-90-80-10=5x+4x

180=9x

180/9=x

x=20
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Answer:

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Using Pythagoras' theorem:

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