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Tju [1.3M]
3 years ago
11

Find the length of a side of an equilateral triangle given its altitude is six inches long.

Mathematics
1 answer:
vampirchik [111]3 years ago
8 0
An equilateral triangle has three 60 degree angles.
The altitude divides it into two 30 60 90 triangles.
The altitude is the "middle side" of such a triangle.
When that is the case, the middle side divided by the square root of 3 = the short side and multiplied by (2/sq root (3)) equals the hypotenuse.
The hypotenuse is the side of the equilateral triangle. 
So, 6 * 2 / (sq root of 3) = <span> <span> <span> 6.9282032303 </span> </span> </span>

Source:
http://www.1728.org/trig2.htm


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What's the area of this triangle
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Answer:

D      A = (1/2) (y₂ - y₁)(x₃ - x₁)

Step-by-step explanation:

b = (y₂ - y₁)

h = (x₃ - x₁)

A = (1/2)bh

A = (1/2) (y₂ - y₁)(x₃ - x₁)

8 0
2 years ago
2y + 9 = 4 pls aswer the question pls pls​
Aleonysh [2.5K]

Step-by-step explanation:

2y+9= 4

2y=-5

y=-5/2

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3 0
1 year ago
Can someone please help :/ the people in my group are being mean,, ill mark you brainlest ​
Alex_Xolod [135]
You’re correct. its 6.25 oz, and bleep the people in ur group man
6 0
2 years ago
Read 2 more answers
You pick a card at random. Without putting the first card back, you
Inga [223]

First, we need the probability of picking an odd number.

There are 5 cards in total, and 3 odd cards (3, 5, and 7).

That means that the probability that we'll draw an odd card would be \frac{3}{5}.

Then, we have 4 cards left, and 2 even cards (4 and 6), meaning that the probability that we draw an even card will be \frac{2}{4} or \frac{1}{2}.

To find the probability that these would happen in consecutive draws, we just multiply the probabilities together.

\frac{3}{5}*\frac{1}{2}=\frac{3}{10} or 0.3.

To convert this into a percentage, we multiply the decimal by 100.

0.3*100=30.

So the probability of picking an odd number and then picking an even number is 30%.

Hope this helps!

8 0
2 years ago
What does this equal<br>​
Maslowich

Yup the answer is 38.6

8 0
3 years ago
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