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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 -

If in a triangle ABC, C = 90° then the maximum value of sin A sin B is -

If in a triangle ABC, C = 90° then the maximum value of sin A sin B is -

In a ABC, 2s = perimeter and R = circum-radius. Then s/R is equal to :

In a ABC, 2s = perimeter and R = circum-radius. Then s/R is equal to :

parallel

If $fraction numerator open parentheses x minus 1 close parentheses open parentheses x squared minus 3 close parentheses over denominator open parentheses x plus 5 close parentheses end fraction less than 0 space t h e n space x element of$

If $fraction numerator open parentheses x minus 1 close parentheses open parentheses x squared minus 3 close parentheses over denominator open parentheses x plus 5 close parentheses end fraction less than 0 space t h e n space x element of$

In triangle ABC, a : b : c = (1 + x) : 1 : (1 – x) where x  (0, 1). If A = $fraction numerator pi over denominator 2 end fraction$ + C, then x =

In triangle ABC, a : b : c = (1 + x) : 1 : (1 – x) where x  (0, 1). If A = $fraction numerator pi over denominator 2 end fraction$ + C, then x =

If the angles of a triangle are in the ratio 1: 2: 3, then the sides opposite to the respective angles are in the ratio -

If the angles of a triangle are in the ratio 1: 2: 3, then the sides opposite to the respective angles are in the ratio -

parallel

If the sides be a, b, c then a cos A + b cos B + c cos C =

If the sides be a, b, c then a cos A + b cos B + c cos C =

A circle touches two of the smaller sides of a ABC (a < b < c) and has its centre on the greatest side. Then the radius of the circle is -

A circle touches two of the smaller sides of a ABC (a < b < c) and has its centre on the greatest side. Then the radius of the circle is -

The radius of the circumscribing circle of a regular polygon of n sides each of length a is -

The radius of the circumscribing circle of a regular polygon of n sides each of length a is -

parallel

Sum of the radii of the circles, which are respectively inscribed and circumscribed about a regular polygon of n sides is -

Sum of the radii of the circles, which are respectively inscribed and circumscribed about a regular polygon of n sides is -

If H is the orthocentre of the triangle ABC, then AH is equal to -

If H is the orthocentre of the triangle ABC, then AH is equal to -

If in a triangle ABC, AD, BE and CF are the altitudes and R is the circum-radius, then the radius of the circle DEF is

If in a triangle ABC, AD, BE and CF are the altitudes and R is the circum-radius, then the radius of the circle DEF is

parallel

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