question help (1 Viewer)

[highshill]

the apex of an isosceles triangle is 35 degree its area is 35 cm sq find its length in milimetres. been stuck on it for a while.
thanks

 

[pikachu975]

What do you mean by the triangle's length?

 

[highshill]

its two isosceles sides length.

 

[highshill]

the equal sides length

 

[Sp3ctre]

Let x be the length of one of the equal sides
A = 1/2absinC
35 = 1/2*x*x*sin35
70 = x^2 sin35
x^2= 70/sin35
x = 122.04 cm = 1220.4 mm

Not sure why they want the answer in mm lol

EDIT::
x^2 = 70/sin35
x = sqrt(70/sin35)
x = 11.05 cm = 110.5 mm

 

[highshill]

answer is written in cm too but its 11.0 cm somehow

 

[Sp3ctre]

answer is written in cm too but its 11.0 cm somehow

Oops I just forgot to take the square root of x, that's what I get for skipping steps ^.^ I edited my answer above