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boyakko [2]
3 years ago
15

I’ll mark you brainlist I’ll mark you brainlist show work

Mathematics
2 answers:
zmey [24]3 years ago
6 0

Answer:

X=66

Step-by-step explanation:

114+x=180

X= 66

atroni [7]3 years ago
6 0
X= 66

Hope this is right



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ABCDEFGHI is a regular 9-sided polygon.
Igoryamba

Answer:

angle BEF = 100 degrees

Step-by-step explanation:

For a regular 9-sided polygon (nonagon),

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each interior angle = 180-40 = 140 degrees.

Referring to diagram, in the trapezoid (trapezium) BCDE, the base angles are 180-140 = 40 degrees.

Therefore angle DEB = 40 degrees

that leaves BEF = 140-40 = 100 degrees

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