Saturday

December 20, 2014

December 20, 2014

Posted by **jenny** on Wednesday, May 4, 2011 at 6:48am.

- maths (mensuration) -
**Reiny**, Wednesday, May 4, 2011 at 7:04amWe know all angles are 60° and all sides are equal.

Let the side be x cm

(1/2)(x)(x)sin60° = 50

x^2 = 100/(√3/2) = 200/√3

x = 10√2/(√√3)) = appr. 10.75 cm

or let each side be 2x

then the height is √3 x

area = (1/2)(2x)(√3x) = 50

√3x^2 = 50

x^2 = 50/√3

x = 5.3728 appr.

so 2x, the side is appr. 10.75

- maths (mensuration) -
**drwls**, Wednesday, May 4, 2011 at 7:04amArea = (1/2)*base*(base/2)*sqrt3

= (sqrt3)(base)^2/4 = 50

base^2 = 200/sqrt3 = 115.47

base = 10.7456599

All sides have that length, since the triangle is equilateral.

**Answer this Question**

**Related Questions**

Maths - triangle ABC is right angled at A. AD is perpendicularto BC. If AB= 5cm,...

maths-urgently needed - In right angled triangle ABC angle B=90 degree and AB= ...

maths-areas - in triangle ABC P, Q AND R ARE the mid points of side AB, BC, CA....

Maths - Triangle ABC has lengths AB=14, AC=18 and also a given angle of ∠...

9th grade - given that a(-1,8) ,b(2,4) and if the line y=4 is the axis of ...

Geometry - Given: X, Y, and Z are the midpoints of teh sides of triangle ABC. ...

geometry - Open that link please please help me with my assignments 1. in the ...

MATHS,7TH CLASS - A RIGHT ANGLED TRIANGLE ABC IS GIVEN,WHERE AB IS 5CM,AC IS ...

Maths - Triangle ABCis right angled at a .AD is perpendicular to BC.If AB=5cm,BC...

maths - Q1) Find area of the triangle ABC where AB=c, AC=b and BC=a. When a=b=c=...