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Hunter-Best [27]
3 years ago
9

What is m∠A ? Please see attachment (The Triangle Sum Theorem)

Mathematics
2 answers:
Travka [436]3 years ago
6 0
It's 60 degrees you're welcome
goblinko [34]3 years ago
5 0
The triangle sum theorem says all 3 interior angles must equal 180 degrees.

so, 43 + 35 = 78.  [ 180 - 78 = 102 degrees for the missing angles shared by the 2 triangles.

102 + 18 = 120.  [180 - 120 = 60}

leaving the measure of Angle A as 60 degrees.
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