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BlackZzzverrR [31]
4 years ago
11

What is the value of a?

Mathematics
2 answers:
Mandarinka [93]4 years ago
8 0

Answer:

a = 13

Step-by-step explanation:

8a + 3a + 37° = 180°

11a + 37° = 180°

11a = 180° - 37°

11a = 143°

a = 143/11

a = 13

sergiy2304 [10]4 years ago
7 0

Answer:

a = 13

Step-by-step explanation:

The three angles of any triangle MUST add up to 180°.  Thus, 3a + 8a + 37 = 180, and 11a = 180 - 37 = 143.

If 11a = 143, then a = 143/11 = 13

a = 13

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