Which of the following circles are congruent?

[1 Mark]

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Solution

Circles C1 and C2 has same radius, so they are congrent.
[0.5 Marks]

Circles C1 and C3 have different radius, so they are not congrent.

Circles C2 and C3 have different radius, so they are not congrent.
[0.5 Marks]

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Recall that two circles are congruent if they have the same radii. Prove that equal chords of congruent circles subtend equal angles at their centres.

In each pair of triangles in the following figures, parts bearing indentical marks are congruent. State the test and correspondence of vertices by which triangles in each pair are congruent.
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(ii)

(iii)

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Q. Fill in the blanks:
(i) Two line segments are congruent if .......
(ii) Two angles are congruent if ......
(iii) Two squres are congruent if .......
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Q. The given circles are congruent.

All circles are congruent.

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Which of the following circles are congruent? [1 Mark]

Circles C1 and C2 has same radius, so they are congrent. [0.5 Marks] Circles C1 and C3 have different radius, so they are not congrent. Circles C2 and C3 have different radius, so they are not congrent. [0.5 Marks]

Which of the following circles are congruent?

[1 Mark]

Circles C1 and C2 has same radius, so they are congrent.
[0.5 Marks]

Circles C1 and C3 have different radius, so they are not congrent.

Circles C2 and C3 have different radius, so they are not congrent.
[0.5 Marks]