3 years ago

11. Sum of angle measures: 180°

Mathematics

1 answer:

shusha [124]3 years ago

7 0

Answer:

$given \: tha \: sum \: is = 180 \\ then \\ n + 4n + 40 = 180 \\ 5n + 40 = 180 \\ 5n = 180 - 40 \\ 5n = 140 \\ n = \frac{140}{5} = 28 \\ n = 28 \\ thank \: you$

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