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ASHWIN TANDEL

· started a discussion

· 1 Months ago

Doubt (Question: 192489.0 )

Can you please explain how in the other triangle you considered angle 2x ?

Question:
In the given figure, if AD = BD = AC, then find the value of \(\angle \)ACD.


Options:
A) \(\cfrac{124^0}{3}\)
B) \(\cfrac{142^0}{3}\)
C) 39°
D) \(\cfrac{73^0}{3}\)
Solution:
Ans: (b) 


Knowledge Expert

· commented

· 1 Months ago

Dear Student,
You need to remember two theorems:
Theorem 1: In a triangle, angles opposite to equal sides are also equal.
Theorem 2: Exterior angle of a triangle at a vertex is equal to the sum of the opposite interior angles.
Now solve it as explained in the solution.
Keep learning with us.
All the Best.
Team Toprankers

m2010

· commented

· 1 Months ago

Exterior angle of a triangle is the sum of interior opposite angles.
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