AP EAMCET · Maths · Properties of Triangles
In a , then the triangle is
- A Equilateral
- B Isosceles
- C Right angled
- D Acute angled triangle
Answer & Solution
Correct Answer
(C) Right angled
Step-by-step Solution
Detailed explanation
We have, 2Δ2(a2+b2+c2)=a2b2c2 ⇒(a2+b2+c2)=(abcΔ)2.12=8R2 ⇒sin2A+sin2B+sin2C=2 ⇒cos2A+cos2B+cos2C=−1 ⇒−1− 4cosAcosBcosC=−1 ∴cosAcosBcosC=0 …
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