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irga5000 [103]
3 years ago
8

A, B & C lie on a straight line.

Mathematics
1 answer:
vekshin13 years ago
3 0

Answer:

x = 27°

Step-by-step explanation:

m<D

m<CBE = 63° (Given)

m<CBE = m<ABD (vertical angles)

m<ABD = 63° (substitution)

x = 180 - (m<ABD + m<D) (Sum of triangle)

x = 180 - (90 + 63)

x = 27°

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