Indicate which pairs of angles are vertically opposite angles.
[1 mark]

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Solution

Pairs of vertically opposite angles are:
$∠ 1$ , $∠ 4$
[0.5 mark]

and $∠ 5$ , ( $∠ 2$ + $∠ 3$ )
[0.5 mark]

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Indicate which pairs of angles are vertically opposite angles. [1 mark]

Pairs of vertically opposite angles are: ∠1, ∠4 [0.5 mark] and ​​​​​​​∠5, (​​​​​​​∠2 + ​​​​​​​∠3) [0.5 mark]

Indicate which pairs of angles are vertically opposite angles.
[1 mark]

Pairs of vertically opposite angles are:
$∠ 1$ , $∠ 4$
[0.5 mark]

and $∠ 5$ , ( $∠ 2$ + $∠ 3$ )
[0.5 mark]