NCERT Solutions for Class 7 Maths Chapter 5 Lines and Angles Ex 5.2 are part of NCERT Solutions for Class 7 Maths. Here we have given NCERT Solutions for Class 7 Maths Chapter 5 Lines and Angles Ex 5.2.

Board |
CBSE |

Textbook |
NCERT |

Class |
Class 7 |

Subject |
Maths |

Chapter |
Chapter 5 |

Chapter Name |
Lines and Angles |

Exercise |
Ex 5.2 |

Number of Questions Solved |
6 |

Category |
NCERT Solutions |

## NCERT Solutions for Class 7 Maths Chapter 5 Lines and Angles Ex 5.2

**Question 1.**

State the property that is used each of the following statements ?

- If a || b, then ∠ 1 = ∠ 5.
- If ∠ 4 = ∠ 6, then a || b.
- If ∠ 4 + ∠ 5 = 180°, then a || b.

**Solution:**

- If two parallel lines are cut by a transversal then the pair of corresponding angles have equal measure.
- If two parallel lines are cut by a transversal then the pairs of alternate interior angles are equal.
- If two parallel lines are cut by a transversal, then the pairs of interior angles on the same side of the transversal are supplementary.

**Question 2.**

In the following figure, identify:

- the pairs of corresponding angles.
- the pairs of alternate interior angles.
- the pairs of interior angles on the same side of the transversal.
- the vertically opposite angles.

**Solution:**

- ∠ 1 and ∠ 5, ∠ 2 and ∠ 6, ∠ 4 and ∠ 8, ∠ 3 and ∠ 7
- ∠ 3 and ∠ 5, ∠ 2 and ∠ 8
- ∠ 3 and ∠ 8, ∠ 2 and ∠ 5
- ∠ 1, ∠ 3, ∠ 2, ∠ 4, ∠ 5, ∠ 7, ∠ 6 and ∠ 8

**Question 3.**

In the adjoining figure, p || q. Find the unknown angles.

**Solution:**

a = 55°, b = 125°, c = 55°, d = 125°, e = 55°, f= 55°.

**Question 4.**

Find the value of x in each of the following figures if l || m.

**Solution:**

- x = 70°
- x = 100°.

**Question 5.**

In the given figure, the arms of two angles are parallel. If ∠ ABC = 70°, then find

**Solution:**

- 70°
- 70°

**Question 6.**

In the given figures below, decide whether l is parallel to m.

**Solution:**

- l is not parallel to m
- l is not parallel to m
- l || m
- l is not parallel to m

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