2. The centre of mirror is called 3. The sound which are pleasant to hear and are in order are called 4. Match the following. A) Stretched membrane X) Tabala B) Stretched string Y) Veena Z) Flute
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The vertex is the geometric center of the mirror.
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2=the centre of mirrors is called pole.
3=the sound which are pleasant to hear and are in order are called pleasant sound.
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