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AfilCa [17]
3 years ago
6

Solve for “a” a - 40 = 21

Mathematics
1 answer:
3241004551 [841]3 years ago
8 0

Answer:

a = 61

Step-by-step explanation:

Isolate the variable a by adding 40 to each side.

a = 21 + 40

a = 61

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How do you find out the measures of angles
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An exterior angle is equivalent to the two most isolated (as in the ones all the way on the other side) interior angles combined.


So this means that m∠Y is equivalent to 138° - 79° which is 59°

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Well as I had mentioned earlier a triangle has 180° we can add the two interior angles that we know and subtract it by 180°.

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