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Vaselesa [24]
3 years ago
5

In the diagram, find the values of a and b.​

Mathematics
1 answer:
uysha [10]3 years ago
8 0

Answer:

<h2>            m∠a = 67° ,   m∠b = 42°</h2>

Step-by-step explanation:

∠a is alternate interior angle to ∠ECD

∠b is alternate interior angle to ∠BCD

so:

If AB || CD then:

m∠a = m∠ECD = 25° + 42° = 67°

m∠b = 42°

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