TS EAMCET · Maths · Properties of Triangles
In an equilateral triangle is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
In an Equilateral triangle, a=b=c ∴s=a+b+c2=3a2 & ∆=34a2 ∴r=∆s=∆3a2=2∆3a=a23 Also, R=abc4∆=a3434a2=a3 And r1=∆s-a=∆3a2-a=2∆a=32a Now, r:R:r1=a23:a3:3a2=1:2:3
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