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faltersainse [42]
3 years ago
8

Find the area of an equilateral triangle of side 12 cm​

Mathematics
2 answers:
Kamila [148]3 years ago
6 0

Answer:

A≈62.35cm²

Step-by-step explanation:

A=3

4a2=3

4·122≈62.35383cm²

RideAnS [48]3 years ago
5 0

Step-by-step explanation:

root 3 by 4a²

root3/4*(12)²

36root3

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There are 7 boys in a class of 15 students ( a ) what is the ratioo of all students in the class to girls? (b) what is the ratio
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A:
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3 years ago
8% of 44 show work please and an answer ciz i domt understand
nalin [4]
Hey there! 

These are the steps involved in answering the question:

Change 8% into a decimal. To do this, just move the decimal place, 2 places to the left.
You get 0.8

Now, multiply 0.8 by 44. 
0.8 x 44 = 35.2

So, the final answer is: 35.2.

<span>(If you feel that my answer has helped you, please consider rating it and giving it a thank you! Also, feel free to choose the best answer, the brainliest answer!)
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7 0
3 years ago
Solve for the 3 sides
mel-nik [20]

Answer:

1. x = 2√3 or 3.46

2. y = 4√3 or 6.93

3. z = 4√6 or 9.80

Step-by-step explanation:

1. Determination of the value of x.

Angle (θ) = 60°

Opposite = 6

Adjacent = x

Tan θ = Opposite /Adjacent

Tan 60 = 6 / x

√3 = 6/x

Cross multiply

x√3 = 6

Divide both side by √3

x = 6 / √3

Rationalise

x = (6 / √3) × (√3/√3)

x = 6√3 / 3

x = 2√3 or 3.46

2. Determination of the value of y.

Angle (θ) = 60°

Opposite = 6

Hypothenus = y

Sine θ = Opposite /Hypothenus

Sine 60 = 6/y

√3/2 = 6/y

Cross multiply

y√3 = 2 × 6

y√3 = 12

Divide both side by √3

y = 12/√3

Rationalise

y = (12 / √3) × (√3/√3)

y = 12√3 / 3

y = 4√3 or 6.93

3. Determination of the value of z.

Angle (θ) = 45°

Opposite = y = 4√3

Hypothenus = z

Sine θ = Opposite /Hypothenus

Sine 45 = 4√3 / z

1/√2 = 4√3 / z

Cross multiply

z = √2 × 4√3

z = 4√6 or 9.80

8 0
3 years ago
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