Question 81(iii)

Two angles have a common vertex and their arms form opposite rays (figure). Then
Write all the pairs of vertically opposite angles

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Solution

Following are the pair of vertically opposite angles:
$∠ 1, ∠ 3; ∠ 2, ∠ 4.$

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Similar questions

Question 81(i)

If two angles have a common vertex and their arms form opposite rays (figure). Then
How many angles are formed?

Question 81(ii)

If two angles have a common vertex and their arms form opposite rays (figure). Then,
How many types of angles are formed?

Question 29

In a pair of adjacent angles, (i) vertex is always common (ii) one arm is always common, and (iii) uncommon arms are always opposite rays. then
(a) all (i), (ii) and (iii) are true
(b) (iii) is false
(c) (i) is false but (ii) and (iii) are true
(d) (ii) is false

Q. Prove that if the sum of two adjacent angles is

180^{o}

, then the non-common arms are two opposite rays.

Q. Write all pairs of vertically opposite angles.

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Vertically Opposite Angles

Standard VII Mathematics

Question 81(iii) Two angles have a common vertex and their arms form opposite rays (figure). Then Write all the pairs of vertically opposite angles

Following are the pair of vertically opposite angles: ∠1, ∠3; ∠2, ∠4.

Question 81(iii)

Two angles have a common vertex and their arms form opposite rays (figure). Then
Write all the pairs of vertically opposite angles

Following are the pair of vertically opposite angles:
$∠ 1, ∠ 3; ∠ 2, ∠ 4.$