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Which postulate or theorem justifies this statement: ∠ 11 + ∠ 10 = 180°

A. Linear Pair postulate

B. Alternate Interior Angles theorem

C. Vertical Angles theorem

D. Same-side Interior Angles theorem

Which postulate or theorem justifies this statement 11 10 180 A Linear Pair postulate B Alternate Interior Angles theorem C Vertical Angles theorem D Sameside I class=

Respuesta :

Answer:

Same-side Interior Angles theorem justifies ∠ 11 + ∠ 10 =180°

Step-by-step explanation:

To Prove:

∠ 11 + ∠ 10 =180°

Proof:

Consider lines are  Parallel,then

Corresponding Angles are Equal

∴ ∠ 10 = ∠ 12  say (equation 1)

Now by Linear Pair postulate we have,

∴ ∠ 11 + ∠ 12 = 180° say (equation 2)

Now by replacing ∠12 by ∠ 10 from equation 1 in equation 2 we get

∴ ∠ 11 + ∠ 10 = 180°

Hence proved the above statement.

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