Check sibling questions

Example 1 - In fig, lines PQ & RS intersect each other at O - Examples

Example 1  - Chapter 6 Class 9 Lines and Angles - Part 2

This video is only available for Teachoo black users

Maths Crash Course - Live lectures + all videos + Real time Doubt solving!


Transcript

Example 1 In Fig, lines PQ and RS intersect each other at point O. If ∠ POR : ∠ ROQ = 5 : 7, find all the angles. Given ∠ POR : ∠ ROQ = 5 : 7 Let ∠ POR = 5x & ∠ ROQ = 7x, where x is some number Now, ∠ POR +∠ ROQ = 180° 5x + 7x = 180° 12x = 180° x = (180° )/12 x = 15° ∠ POR = 5x ∠ ROQ = 7x Since PQ and RS are two lines intersecting each other, we apply vertically opposite angle theorem to it ∠ POS = ∠ ROQ = 105° and ∠ SOQ = ∠ POR = 75 °

Ask a doubt (live)
Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.