3 years ago

Not really understanding this, thanks for help in advance

Mathematics

2 answers:

Zolol [24]3 years ago

5 0

Answer:

102

Step-by-step explanation:

Exterior angle is sum of interior angles.

∠1 = 51 + 51

∠1 = 102

inna [77]3 years ago

5 0

Answer: m∠1 = 102°

Step-by-step explanation:

The inside angles of a triangle always add up to 180°

so get the 3rd inside angle with

$180-51-51=78$

And we know that a straight line in 180° on each side

So we take 180° and subtract 78° to get our answer 102°

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