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Nadya [2.5K]
3 years ago
6

Help pleaseeeeeeeeeeeeeee

Mathematics
1 answer:
Anni [7]3 years ago
4 0

Answer:

b

Step-by-step explanation:

The top vertex of the triangle on the right is 51° ( alternate angle to 51°

The sum of the 3 angles in a triangle = 180° thus

51 + 72 + y - 6 = 180 , that is

y + 117 = 180 ( subtract 117 from both sides )

y = 63 , then

y - 6 = 63 - 6 = 57

------------------------------

x - 5 , 51 and y - 6 lie on a straight line , therefore

x - 5 + 51 + y - 6 = 180

x - 5 + 51 + 57 = 180

x + 103 = 180 ( subtract 103 from both sides )

x = 77

Thus x = 77 , y = 63 → b

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