If two straight lines intersect then which of the following statement/s is/are true?

Sum of adjacent angles is $180^{\circ}$ .

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Vertically opposite angles are not equal

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Vertically opposite angles are supplementary

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Sum of adjacent angle is $90^{\circ}$

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Solution

The correct option is A
Sum of adjacent angles is $180^{\circ}$ .

If two lines intersect, we observe that adjacent angles

$∠ A O C + ∠ A O D = 180 - x^{\circ} + x^{\circ}$

$∠ A O C + ∠ A O D = 180^{\circ}$

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Similar questions

Q. When two straight lines intersect, which of the following statements is/are true?

If two straight lines intersect then

If a transversal intersects two parallel lines, then, which of the following statements holds true?

Q. If l and m are intersecting lines,

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, then which of the following statements is true?

Which of the following statements are true (I) and which are false (F)? Give reasons.
(i) If two lines are intersected by a transversal, then corresponding angles are equal.
(ii) If two parallel lines are intersected by a transversal, then alternate interior angles are equal.
(iii) Two lines perpendicular to the same line are perpendicular to each other.
(iv) Two lines parallel to the same line are parallel to each other.
(v) If two parallel lines are intersected by a transversal, then the interior angles on the same side of the transversal are equal.

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If two straight lines intersect then which of the following statement/s is/are true?

The correct option is A Sum of adjacent angles is 180∘. If two lines intersect, we observe that adjacent angles ∠AOC+∠AOD=180−x∘+x∘ ∠AOC+∠AOD=180∘

The correct option is A
Sum of adjacent angles is $180^{\circ}$ .

If two lines intersect, we observe that adjacent angles

$∠ A O C + ∠ A O D = 180 - x^{\circ} + x^{\circ}$

$∠ A O C + ∠ A O D = 180^{\circ}$