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Nana76 [90]
2 years ago
10

What is the area of an equilateral triangle with the base of 8 cm? Round your answer to the hundredths place. ​

Mathematics
2 answers:
Lady_Fox [76]2 years ago
5 0

Step-by-step explanation:

\frac{{x}^{2} \times  \sqrt{3}}{4}

for x=8, area=16*root(3)

Contact [7]2 years ago
5 0

Answer:

Let's find the height:

Half of 8 is 4.

4^2 + 8^2 = 80

80(lets find the square root of 80): 8.944 ^2 = 79.995136 close enough to 80

Your new height is 8.944.

8 x 8.944 = 71.552, 71.552 x 1/2 (basically just dividing by 2) = 35.776 rounded would be = 35.78 cm^2

Formula of area of a triangle:

B(base)H(height) x 1/2(basically just dividing by 2)

In this case 8 is your base and 8.944 is your height.

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Solve for x, given the equation Square root of x plus 9 − 4 = 1.
yuradex [85]
√x + 9 - 4 = 1
     √x + 5 = 1
           √x = -4
           √x = √-4
             x = 2i



3 0
3 years ago
Read 2 more answers
What is x in this geometry equation?​
lesya [120]

Answer:

x = 7

Step-by-step explanation:

m\overset{\frown} {PQ} = m\overset{\frown} {MN}... (given) \\\therefore Chord \:PQ \cong Chord\: MN\\  \therefore \: 4x + 10 = 38 \\   \therefore \: 4x= 38  - 10\\ \therefore \: 4x= 28\\  \therefore \: x=  \frac{28}{4} \\   \huge \red{ \boxed{\therefore \: x= 7}}

8 0
3 years ago
Which simplified fraction is equal to 0.53 with bar?
Oxana [17]

I assume that 0.53 with a bar means the decimal fraction in which 3 is repeating.

24/45, 8/15, and 48/90 all result in the same decimal value. Thus, we are simply looking for the one that is fully simplified.

The correct answer is 8/15.

Hope this helps!

5 0
1 year ago
A car costs$cents when new. It was sold for four fifths of its cost price. How much money was lost on the car.
REY [17]

The question is incomplete as the cost price isn't given. However, taking the cost price as x :

Answer:

Kindly check explanation

Step-by-step explanation:

Given :

A car costs$cents when new. It was sold for four fifths of its cost price. How much money was lost on the car.

Let :

Cost price when new = x

Cost price when sold = 4/5 * cost price when new

Cost when sold = 4/5 of x = 4x/5

Amount of money lost on the car = (Cost price of car when new - Cost of car when sold)

Hence,

Amount of money lost on the car = (x - 4x/5)

x - 4x/5 = (5x - 4x) / 5 = x / 5

To obtain the exact price, kindly input the omitted cost when new for x.

7 0
2 years ago
Answers are needed urgently..ty​
SIZIF [17.4K]

Angle <QAB is =15° because the opposite angles of an isosceles triangle are equal.

The length of the straight line AB = 80cm

<h3>Calculation of angle of a triangle</h3>

The angle at a point = 360°

Angle AQB= 360 - 210° = 150

But the angle that makes up a triangle= 180°

180-150= 30°

But <QAB = <QBA because triangle AQB is an isosceles triangle.

30/2 = 15°

To calculate the length of the straight line the following is carried out using the sine laws.

a/ sina, = b sinb

a= 8cm, sin a { sin 15)

b= ? , sin B = 150

make b the subject formula;

8/sin15= b/sin 150

b= 8 × sin 150/sin 15

b= 80cm

Learn more about isosceles triangle here:

brainly.com/question/25812711

#SPJ1

7 0
2 years ago
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