Subscribe to our Youtube Channel - https://you.tube/teachoo
Example 12 - Chapter 7 Class 10 Coordinate Geometry
Last updated at May 29, 2018 by Teachoo
Transcript
Example 12 Find the area of a triangle formed by the points A(5, 2), B(4, 7) and C (7, – 4). Area of triangle ABC = 1/2 [ x1(y2 – y3) + x2(y3 – y1) + x3(y1 – y2) ] Here x1 = 5 , y1 = 2 x2 = 4 , y2 = 7 x3 = 7 , y3 = −4 Putting values Area of triangle ABC = 1/2 [ 5(7 – (−4)) + 4(−4 – 2 ) + 7(2 − 7) ] = 1/2 [ 5(7 + 4) + 4(−6 ) + 7(−5) ] = 1/2 [ 5(11) + 4(−6 ) + 7(−5) ] = 1/2 [ 5(11) + 4(−6 ) + 7(−5) ] = 1/2 [55 – 24 – 35 ] = 1/2 [−4] = −2 Since, Area cannot be negative Area of triangle ABC = 2 square units
Examples
Example 1
Example 2 Important
Example 3
Example 4
Example 5 Important
Example 6
Example 7
Example 8
Example 9 Important
Example 10
Example 11 Not in Syllabus - CBSE Exams 2021
Example 12 Not in Syllabus - CBSE Exams 2021 You are here
Example 13 Not in Syllabus - CBSE Exams 2021
Example 14 Important Not in Syllabus - CBSE Exams 2021
Example 15 Not in Syllabus - CBSE Exams 2021
Chapter 7 Class 10 Coordinate Geometry
Serial order wise
About the Author
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.