Question 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
Made by
Davneet Singh
Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo
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