1.

let l Be a line and PB are point not on l through P draw a line parallel to Al now joint P2 any point on elss choose any other. Are on am through our draw a line parallel to PQ let this meet l at as what shape do the two sets of parallel line and closed​

Answer»

Answer:

In △ABC AB=AC

⇒∠B=∠C (Angles OPPOSITE to equal sides are equal)

Now using angle SUM property

∠A+∠B+∠C=180

∘

⇒80

∘

+∠C+∠C=180

∘

⇒2∠C=180

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−80

∘

⇒∠C=

2

100

∘

=50

∘

now ∠C+∠x=180

∘

(Angles made on straight LINE (AC) are SUPPLEMENTARY)

⇒50

∘

+∠x=180

∘

⇒∠x=180

∘

−50

∘

=130

∘


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