1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
shutvik [7]
3 years ago
13

An equilateral triangle has a side length of 6. What is the height of the triangle?

Mathematics
2 answers:
vlabodo [156]3 years ago
5 0
Since the height of an equilateral triangle in terms of its side s is s√3/2, the height of the triangle is 6√3/2 = 3√3 and so the area is (1/2)(6)(3√3) = 9√3. 

<span>If we draw a horizontal line a height of h from the base of the triangle, the region is split into two regions: the lower region consisting of a trapezoid of height h and the upper region consisting of a triangle of height 3√3 - h. </span>

<span>Since the upper triangle and the triangle itself are similar triangles, the base and height are proportional. If we let x denote the base of the length of the upper triangle, we have: </span>

<span>(S. of small triangle)/(S. of big triangle) = (Ht. of small triangle)/(Ht. of big triangle) </span>
<span>==> x/6 = (3√3 - h)/(3√3) </span>
<span>==> x = (6√3 - 2h)/√3 </span>

<span>Thus, the area of the upper triangle is: </span>

<span>A = (1/2)[(6√3 - 2h)/√3](3√3 - h) = [(6√3 - 2h)(3√3 - h)]/(2√3). </span>
<span>(Made a dumb mistake about the height here for some reason) </span>

<span>Since we require that the area of this triangle is to be half of the total area (9√3/2), we need to solve: </span>

<span>[(6√3 - 2h)(3√3 - h)]/(2√3) = 9√3/2 </span>
<span>==> (6√3 - 2h)(3√3 - h) = 27 </span>
<span>==> 54 - 6h√3 - 6h√3 + 2h^2 = 27 </span>
<span>==> 2h^2 - 12h√3 + 27 = 0. </span>

<span>Solving with the Quadratic Formula gives: </span>

<span>h = (6√3 + 3√6)/2 ≈ 8.87 units and h = (6√3 - 3√6)/2 ≈ 1.52 units. </span>

<span>Since h = (6√3 + 3√6)/2 would place the line outside of the triangle, we pick h = (6√3 - 3√6)/2. </span>

<span>Therefore, the line should be ==> (6√3 - 3√6)/2 units from the base. </span>

<span>I hope this helps! ^^ Brainliest Please?</span><span>
</span>
bulgar [2K]3 years ago
4 0

Answer:

The height of the triangles is  3* sqrt(3)

Step-by-step explanation:

To find the height of an equilateral triangles we can use the rule of 30-60-90 Triangles where:

Height : a* sqrt(3)

Shorter side: a

Hypotenuse: 2a

Where a is the side of the base or shorter side of the triangle. If you draw the height of an equilateral triangle to its base you bisect one of the angles in two 30 degrees angles. So we arrive to two  30 - 60 -90 triangles. The  height divides the side into segments of length 3. So following the 30-6090 rule, the measures of this triangles are:

Shorter side: 3

Hypotenuse: 6

Height : 3* sqrt(3)

This height is equivalent to the one of the equilateral triangle so the height of the equi triangle is  3* sqrt(3)

You might be interested in
Quick!!!
Diano4ka-milaya [45]

A function assigns the values. The graph can be plotted as shown below.

<h3>What is a Function?</h3>

A function assigns the value of each element of one set to the other specific element of another set.

Given the function, g(x) = -3(1/2)ˣ, therefore, the value of g(x) can be written as,

g(x) = -3(1/2)ˣ

g(-2) = -3(1/2)² = -0.75

g(-1) = -3(1/2)¹ = -1.5

g(0) = -3(1/2)⁰ = -3

g(1) = -3(1/2)¹ = -1.5

Hence, the graph can be plotted as shown below.

Learn more about Function:

brainly.com/question/5245372

#SPJ1

7 0
2 years ago
Help me on this to I'm begging u I'm so sorry I'm up so late but the school I'm in is wack ​
lianna [129]

Answer:

Answer below

Step-by-step explanation:

1. C 2

2. The temperature from 15°F to -6°F has changed by 21°F

5. C $37

I hope this helps

6 0
2 years ago
The temperature at noon at a ski resort is 3 F . The temperature drops 8 F by midnight what is the temperature at midnight
tester [92]
-5F because 3-8= -5
6 0
2 years ago
The hourly wage for an employee is $11.5 per hour. The employee also earns 80 cents for each item they manufacture during the wo
Dovator [93]

Answer:

x = 11.5h+.8q

Step-by-step explanation:

x = the total salary made in a day

11.5 represents the 11.5 he earns per hour. You then add this to the 80 cents (.8) he makes per product (q)

6 0
2 years ago
Classify each sequence as arithmetic, geometric or neither:
Serhud [2]
1. Neither 
2. Arithmetic
3. geometric
(I may be wrong, ask this question again sometime. We just learned this in math class and  99% sure I'm right.)  
5 0
3 years ago
Other questions:
  • Answer Please :(<br> I need help:(
    13·2 answers
  • PLS HELPPP!!!!!! <br><br>just to be clear c is not correct ​
    11·1 answer
  • I need help please solve
    12·1 answer
  • kevin has 280 eraser in boxed there are 40 boxes the erasers are equally distributed. He distributed one box among 2 students. F
    8·2 answers
  • What is the value of x after these statements if the starting value of x is 3.
    15·1 answer
  • Three bananas and two pears cost 95p.
    8·1 answer
  • PLEASE HURRY!!!!! I REALLY NEED SOME HELP!!!!!!!
    12·2 answers
  • If a two story home has a ground floor of 25*30 feet and second floor of 20*30 feet, what is the total square footage of the hom
    12·1 answer
  • 6.
    12·2 answers
  • Sandra rode her bike 5 times as many miles as Barbara. If b, the distance Barbara rode, equals 3.4 miles, what is the correct ex
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!