Check sibling questions

Ex 6.5, 17 - In ABC, AB = 6 root3 cm, AC = 12 cm, BC = 6 cm - Pythagoras Theoram - Finding value

Ex 6.5, 17 - Chapter 6 Class 10 Triangles - Part 2

This video is only available for Teachoo black users

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


Transcript

Ex 6.5, 17 Tick the correct answer and justify : In ABC, AB = 6 3cm, AC = 12 cm and BC = 6 cm. The angle B is : (A) 120 (B) 60 (C) 90 (D) 45 Let us check whether it is a right angle triangle To prove any triangle to be the right triangle. We use Pythagoras theorem (Hypotenuse)2 = (Height )2 + (Base)2 Here, Hypotenuse is longest side i.e. AC = 12 cm Since L.H.S = R.H.S , Pythagoras theorem is satisfied Hence ABC is a right angled triangle with Hypotenuse = AC = 12 cm So, Angle opposite to hypotenuse (AC) will be 90 Hence, = 90 So, C is the correct answer

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.