# Mathematics Class 6 NCERT Solutions: Chapter 5 Understanding Elementary Shapes Exercise 5.3

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Q.1 Match the following:

(i) | Straight angle | (a) | less than one-fourth a revolution |

(ii) | Right angle | (b) | more than half a revolution |

(iii) | Acute angle | (c) | half of a revolution |

(iv) | Obtuse angle | (d) | one-fourth a revolution |

(v) | Reflex angle | (e) | Between and of a revolution |

(f) | one complete revolution |

Answer:

(i) | Straight angle | (a) | half of a revolution |

(ii) | Right angle | (b) | one-fourth a revolution |

(iii) | Acute angle | (c) | less than one-fourth a revolution |

(iv) | Obtuse angle | (d) | Between and of a revolution |

(v) | Reflex angle | (e) | more than half a revolution |

Q.2 Classify each one of the following angles as right, straight, acute, obtuse or reflex:

(a)

Answer: Acute angle (Less than

(b)

Answer: Obtuse angle (greater than and less than )

(C)

Answer: Right angle (equals

(d)

Answer: Reflex angle (greater than but less than)

(e)

Answer: Straight angle (equals

(f)

Answer: Acute angle (less than