Geometry Questions
Questions - 1
If triangle ABC is a obtuse angle triangle.
यदि ABC अधिक कोण त्रिभुज है
if BD = CD , ∠ACB = 30°
∠ADB = 45°
Then Find ∠BAD = ?
(A) 110° (B) 60°
(C) 40° (D) 80°
Solution - (A)
BD = CD = X
Apply 30°-60°-90° Rule in ▲BLC
NOTE, BL = X
and ▲BLD is an Equilateral Triangle
Where , BL=LD=BD
SO , ∠ADL= 15°
in ▲ADL angle ∠ADL= 15° , and ∠DAL= 15°
SO , AL = DL
Chunki AL = DL = BL
SO , L is the circumcenter of ▲ABD
∠BLD = 60°
∠BAD = 60°
Answer should be 30,
ReplyDeleteyes, answer must be 30degree
ReplyDeleteAnswer should be 30 degree..
DeleteNot understood sir. Plz explain it sir because my answer is coming 30°.
ReplyDeleteYes answer should be 30 so that triangle will be obtuse
ReplyDeleteYes sir answer will be 60degree..correct
ReplyDeleteif 60 ..then it should not be obtuse angle triangle
ReplyDelete