Home/
Competitive Exams/
JEE Main & Advanced/
Mathematics/
Trigonometry/
Question 200037
JEE Mathematics · Hard

Trigonometry: Inradius MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
InradiusHardQuestion 200037

Question

The inradius r of a triangle is given by:
  1. A
    r = Δ/s
    Correct
  2. B
    r = s/Δ
  3. C
    r = abc/(4Δ)
  4. D
    r = Δ/(s − a)

Correct answer

r = Δ/s

Explanation

Inradius r = Area/semi-perimeter = Δ/s, where s = (a+b+c)/2.

Review Trigonometry notesStart timed chapter practice