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ziro4ka [17]
3 years ago
13

Find the measure of A. No links!!!!

Mathematics
1 answer:
leva [86]3 years ago
4 0

Answer:

A equals 105 degrees, option 2

Step-by-step explanation:

7x + 5x gives 180. 7x and 5x lie on a line so they form a linear pair. Their sum equals 180 degrees:-

7x + 5x = 180

12x = 180

x = \frac{180}{12}

<u>x = 15</u>

Since x is 15, we can find the lengths of 7x and 5x.

<u>7x would be 7 x 15 = 105</u>

<u>5x would be 5 x 15 = 75</u>

'A' is equal to 7x since they are vertically opposite angles.

Since 7x is 105 degrees, then A would be 105 degrees as well.

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