An equilateral triangle has an altitude length of 36 feet. determine the length of a side of the triangle. ( answer needs to be in reduced radical form )

Step-by-step explanation:

Look at the attached image. By definition an equilateral triangle has 3 equal angles of 60 ° and has 3 sides of equal length.

In this case we know the length of its Height H shown in the image.

H = 36 °.

Since all angles of the equilateral triangle are 60 ° then X ° = 60 °.

So to find the L side we use the definition of the sine function:

Note that in this case:

So:

Now we solve the equation for L

24√3 feet

Step-by-step explanation:

Consider an equilateral triangle with sides that are 2 units in length.

If you divide an equilateral triangle vertically into two halves, you will end up with 2 smaller triangles with hypotenuse = 2 units and base = 1 unit (see attached drawing). By Pythagorean theorm, we can determine the height of the triangle to be units.

This proportion of sides ( 1  : √3 : 2) is a characteristic property of a special type of right-triangle that is created by dividing an equilateral triangle into 2 halves (and is worth memorizing).

From the diagram we can see that the ratio of the dimensions of the right triangle:

base : height   =  1  : √3

mathematically,

base (of right angle) / height = 1 / √3

or

base (of right angle) = (1 / √3)   x height

in the question, it is given that altitude (aka) height = 36 feet

hence,

base (of right angle) = (1 / √3)   x 36 feet = (36/√3) feet = 12√3 feet

base (of equilateral triangle) = 2 x base (of right angle)

= 2 x (12√3 ) = 24√3 feet

c > -10.55

step-by-step explanation:

starting with:    

5 + x - 12 = 2x - 7   

5 + x - 12 - x = 2x - 7 - x (subtract x from both sides)   

5 - 12 = x - 7 (combine and cancel x's from both sides)   

5 - 12 + 7 = x - 7 + 7 (add 7 to both sides)   

0 = x (add numbers together on both sides)       

so in order for the equation to be true, x must be 0.   

trying x = -0.5   

5 + x - 12 = 2x - 7 (original equation)   

5 + -0.5 - 12 = 2(-0.5) - 7 (plug in value of x)   

5 + -0.5 - 12 = -1 - 7 (did multiplication)   

-7.5 = -8 (did addition on both sides)       

since -7.5 is obviously not equal to -8, the value of -0.5 for x is wrong.   

trying x = 0   

5 + x - 12 = 2x - 7 (original equation)   

5 + 0 - 12 = 2(0) - 7 (plug in value of x)   

5 + 0 - 12 = 0 - 7 (did multiplication)   

-7 = -7 (did addition on both sides)       

since -7 equals -7, that demonstrates that the value of 0 for x is correct.   

trying x = 1   

5 + x - 12 = 2x - 7 (original equation)   

5 + 1 - 12 = 2(1) - 7 (plug in value of x)   

5 + 1 - 12 = 2 - 7 (did multiplication)   

-6 = -5 (did addition on both sides)       

since -6 is obviously not equal to -5, the value of 1 for x is wrong.