Question

find the value of the angle × in the following cases also please....​

Answer 1

Answer:

$1st \:50 + x + (180 - 130) = 180 \\ 50 + x + 50 = 180 \\ x = 180 - 100 \\ x = 80$

$2nd \: 25 + x + (180 - 80) = 180 \\ 25 + x + 100 = 180 \\ x = 180 - 125 \\ x = 55$

$3rd \: 60 + x + (180 - 125) = 180 \\ 60 + x + 55 = 180 \\ x = 180 - 115 \\ x = 65$

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Answer 2

Answer:

d. 50° + x + ( 180 - 130)° = 180° ( as sum of 3 angles is 180°)

or, 50° + x + 50° = 180°

or, 100° + x = 180°

or, x = 180° - 100° = 80°

Therefore, the value of x is 80°

e. 25° + x + ( 180 - 80)° = 180° ( as sum of 3 angles is 180°)

or, 25° + x + 100° = 180°

or, 125° + x = 180°

or, x = 180° - 125° = 55°

Therefore, the value of x is 55°

f. 60° + x + ( 180 - 125)° = 180° ( as sum of 3 angles is 180°)

or, 60° + x + 55° = 180°

or, x + 115° = 180°

or, x = 180° - 115° = 65°

Therefore, the value of x is 65°

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