Vidyalelo
Aptitude · Q107

Geometry

Competitive Exams · Aptitude · question 107

Q107

Incentre of ΔABC is I. ∠ABC = 90° and ∠ACB = 70°. Then ∠BIC is

A.
115°
B.
100°
Answer
C.
110°
D.
105°

Answer: Option B

Solution

Answer: Option B
Solution:
∵ Sum of all angles of a triangle = 180°
So, ∠BAC = 180° - (90° + 70°) = 20°
Geometry mcq question image
So, ∠BIC = 90° + ∠A
∠BIC = 90° + × 20°
∠BIC = 100°