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VMariaS [17]
3 years ago
5

Can someone help me with this please

Mathematics
1 answer:
miss Akunina [59]3 years ago
4 0

Answer:

a=100.

Step-by-step explanation:

We know that b and the other angle equal 40. So if you add those two up, they equal 80.  We also know that all angles in a triangle add up to 180.

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