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3 years ago

How do I find the area of a triangle?

2 answers:

6 0

<span>Well I cant draw a determinant in this format. Otherwise it was very simple to explain. Any way I will try to explain in words only.

In your case:

Assume first figure in each bracket as x-coordinate ( along with the individual sign ), and the second figure as y-coordinate ( along with the individual sign ). Thus

x1 = 1, x2 = 6 and x3 = 2. Similarly y1 = 1, y2 = 6 and y3 = 10
Then draw up a 3x3 determinant in which arrange x1, x2, x3 in First column, similarly y1, y2, y3 in the second column and put 1 , 1, 1 in the third column.

Then if D is the value of this determinant, the required area of the triangle will be half of it. Symbolically,

A = 1/2. D

In this case you get D = 40 units and Area = D/2 = 40/2 = 20 sq units...................... Answer</span><span>

</span>

Lerok [7]3 years ago

4 0

U got to do base times height

You might be interested in

What was Dimitri's mistake? He mixed up the coordinates of the ordered pair when Substituting it into the equations 7x+9y=-4 and

seropon [69]

Answer:

He made a mistake in his calculations when simplifying 5x - 2y

Step-by-step explanation:

Given

The coordinate pair

$(x,y) = (2,-2)$

The equations

$7x + 9y = ?$

$5x - 2y = ?$

Dimitri's Solution

$Equation\ 1: 7x + 9y = -4.$

$7(2) + 9 (-2) = -4.$

$14 + (-18) = -4.$

$-4 = -4.$

$Equation\ 2: 5x -2y = 6.$

$5(2) - 2 (-2) = 6.$

$10 - 4 = 6.$

$6 = 6.$

Required

Identify Dimitri’s mistake

In the first equation, Dimitri made no mistake.

However, he made a mistake when simplifying the second equation.

We have:

$5x - 2y$

and

$(x,y) = (2,-2)$

Substitute $x = 2$ and $y = -2$

So, we have:

$5(2) -2(-2)$

Open bracket

$10 +4$

Finally, we have:

$14$

7 0

3 years ago

Michael has constructed a device that fits on the end of a water hose. With this device, he can adjust the diameter of a tube co

Oduvanchick [21]

x
---- = 5 (solve for x)
0.6

x = 5(0.6)
x = 3

then....

3
----- = 15
0.2

your answer should be 15 ft per second.

hope this helps :)

3 0

4 years ago

Read 2 more answers

Is (4, 3) a solution to the inequality 7x + 5y = 15?<br> yes<br> no

torisob [31]

Answer:

Step-by-step explanation:

7x+5y=15

(x,y)

(4,3)

put in 4 for x and 3 for y

7(4)+5(3)=15

43=15

This equation is impossible

Hope that helps :0

4 0

3 years ago

Read 2 more answers

What is the area of this figure? Round to the tenth if necessary.

Julli [10]

Answer:

<h3>b) 850.1 centimeters.</h3>

Step-by-step explanation:

To find the area of this figure, we must first find the areas of the shapes that compose this figure.

This figure is made up of a rectangle and a semicircle.

Remember: To find the area of a semicircle, multiply the radius by itself twice, then multiply the product pi, lastly divide the product by 2.

$a=\pi r^2/2$

To find the area of a rectangle, multiply the length by the width. The product is the area of the rectangle.

$a=lw$

Now, let's solve.

The diameter of the semicircle is 32 centimeters.

To find the radius of a semicircle, divide the diameter by 2.

$32/2=16$

The radius of the semicircle is 16 centimeters.

Now that we have the radius, we can find the area of the semicircle.

$\pi 16^2/2=401.92$

The area of the semicircle is 401.92 centimeters.

Furthermore, we find the area of the rectangle.

$14*32=448.$

The area of the circle is 448 centimeters.

Next, we add the areas of both shapes to find the area of this figure.

$401.92+448$

$=849.92$

The final step is to round 849.92 to the nearest tenth.

Even though 849.92 to rounded to the nearest tenth is 849.9, there is no answer choice for this. The closest one to this answer is choice 'b.'

I, therefore, believe the area of this figure is 850.1 centimeters.

3 0

3 years ago

What is 7.3 rounded to the nearest whole number?

dimulka [17.4K]

7 because 3 is less than five

3 0

3 years ago