Question 1.

Match the following:

Measure of the angle | Type of the angle | ||

i. | 180° | a. | Zero angle |

ii. | 240° | b. | Straight angle |

iii. | 360° | c. | Reflex angle |

iv. | 0° | d. | Complete angle |

Solution:

(i – Straight Angle),

(ii – Reflex Angle),

(iii – Complete Angle),

(iv – Zero Angle).

Question 2.

The measures of some angles are given below. Write the type of each angle:

- 75°
- 0°
- 215°
- 360°
- 180°
- 120°
- 148°
- 90°

Solution:

- Acute angle
- Zero angle
- Reflex angle
- Complete angle
- Straight angle
- Obtuse angle
- Obtuse angle
- Right angle

Question 3.

Look at the figures below and write the type of each of the angles:

Solution:

a. Acute angle

b. Right angle

c. Reflex angle

d. Straight angle

e. Zero angle

f. Complete angle

Question 4.

Use a protractor to draw an acute angle, a right angle and an obtuse angle:

Solution:

[Note: Students may draw acute and obtuse angles of measure other than the ones given.]

**Intext Questions and Activities**

Question 1.

Look at the angles shown in the pictures below. Identify the type of angle and write its name below the picture: (Textbook pg. no. 6)

Solution:

Question 2.

Complete the following table: (Textbook pg. no. 6)

Solution:

Sr. No. | i. | ii. | iii. |

Name of the angle | ∠PYR or ∠RYP | ∠LMN or ∠NML | ∠BOS or ∠SOB |

Vertex of the angle | Y | M | O |

Arms of the angle | YP and YR | ML and MN | OB and OS |