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Maths-

General

Easy

Question

In a ABC, if $fraction numerator R over denominator r end fraction$  2, then the triangle is -

scalene
isosceles
right angled
equilateral

The correct answer is: equilateral

Related Questions to study

abc =

abc =

If the altitudes of a triangle be 3, 4, 6 then its in-radius is -

If the altitudes of a triangle be 3, 4, 6 then its in-radius is -

4Rr cos $fraction numerator A over denominator 2 end fraction$ cos $fraction numerator B over denominator 2 end fraction$ cos $fraction numerator C over denominator 2 end fraction$ =

4Rr cos $fraction numerator A over denominator 2 end fraction$ cos $fraction numerator B over denominator 2 end fraction$ cos $fraction numerator C over denominator 2 end fraction$ =

parallel

If the area of a triangle is 81 square cm and its perimeter is 27cm then its in-radius in centi-metres is -

If the area of a triangle is 81 square cm and its perimeter is 27cm then its in-radius in centi-metres is -

(r1 + r2) (r2 + r3) (r3 + r1) =

(r1 + r2) (r2 + r3) (r3 + r1) =

r2 r3 + r3 r1 + r1 r2 =

r2 r3 + r3 r1 + r1 r2 =

parallel

If the sides be a, b, c then $fraction numerator r subscript 1 end subscript minus r over denominator a end fraction plus fraction numerator r subscript 2 end subscript minus r over denominator b end fraction$ =

If the sides be a, b, c then $fraction numerator r subscript 1 end subscript minus r over denominator a end fraction plus fraction numerator r subscript 2 end subscript minus r over denominator b end fraction$ =

In any ABC, cosA + cosB + cosC =

In any ABC, cosA + cosB + cosC =

In any ABC, sinA + sinB + sinC =

In any ABC, sinA + sinB + sinC =

parallel

In an equilateral triangle the in-radius and the circum-radius are connected by -

In an equilateral triangle the in-radius and the circum-radius are connected by -

If the sides of a triangle are 3 : 7 : 8 then R : r =

If the sides of a triangle are 3 : 7 : 8 then R : r =

In a triangle ABC, $fraction numerator a cos invisible function application A plus b cos invisible function application B plus c cos invisible function application C over denominator a plus b plus c end fraction$ is equal to -

In a triangle ABC, $fraction numerator a cos invisible function application A plus b cos invisible function application B plus c cos invisible function application C over denominator a plus b plus c end fraction$ is equal to -

parallel

In a ABC, 2R2 sinA sinB sinC =

In a ABC, 2R2 sinA sinB sinC =

If 8R2 = a2 + b2 + c2, then the  is -

If 8R2 = a2 + b2 + c2, then the  is -

In an equilateral triangle of side $2 square root of 3$ cms. The circum radius is -

In an equilateral triangle of side $2 square root of 3$ cms. The circum radius is -

parallel

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