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loris [4]
2 years ago
14

Please help me ………,,,

Mathematics
1 answer:
Sonbull [250]2 years ago
5 0
I think it’s C
maybe it’s right
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Area of a triangle with points at (-9,5), (6,10), and (2,-10)
Ann [662]
First we are going to draw the triangle using the given coordinates. 
Next, we are going to use the distance formula to find the sides of our triangle.
Distance formula: d= \sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2}

Distance from point A to point B:
d_{AB}= \sqrt{[6-(-9)]^2+(10-5)^2}
d_{AB}= \sqrt{(6+9)^2+(10-5)^2}
d_{AB}= \sqrt{(15)^2+(5)^2}
d_{AB}= \sqrt{225+25}
d_{AB}= \sqrt{250}
d_{AB}=15.81

Distance from point A to point C:
d_{AC}= \sqrt{[2-(-9)]^2+(-10-5)^2}
d_{AC}= \sqrt{(2+9)^2+(-10-5)^2}
d_{AC}= \sqrt{11^2+(-15)^2}
d_{AC}= \sqrt{121+225}
d_{AC}= \sqrt{346}
d_{AC}= 18.60

Distance from point B from point C
d_{BC}= \sqrt{(2-6)^2+(-10-10)^2}
d_{BC}= \sqrt{(-4)^2+(-20)^2}
d_{BC}= \sqrt{16+400}
d_{BC}= \sqrt{416}
d_{BC}=20.40

Now, we are going to find the semi-perimeter of our triangle using the semi-perimeter formula:
s= \frac{AB+AC+BC}{2}
s= \frac{15.81+18.60+20.40}{2}
s= \frac{54.81}{2}
s=27.41

Finally, to find the area of our triangle, we are going to use Heron's formula:
A= \sqrt{s(s-AB)(s-AC)(s-BC)}
A=\sqrt{27.41(27.41-15.81)(27.41-18.60)(27.41-20.40)}
A= \sqrt{27.41(11.6)(8.81)(7.01)}
A=140.13

We can conclude that the perimeter of our triangle is 140.13 square units.

3 0
3 years ago
Necesito ayuda por fis​
svet-max [94.6K]

Answer:

pues que es en que necesitas ayuda

Step-by-step explanation:

dime namas comentame y te ayudo

3 0
3 years ago
2p^2+10=0 <br><br> Please help!
ohaa [14]
2p^2+10=0\ \ \ |-10\\\\2p^2=-10\ \ \ |:2\\\\p^2=-5
No real solutions, because for all real numbers the square of number is greater or equal 0.


7 0
3 years ago
My grandmother recipe for muffins calls for 4 tsp baking powder and 2.5 c of flour how much baking powder will be needed if i us
Korvikt [17]

Answer:

24

Step-by-step explanation:

15/2.5=6

multiply 4 by 6 and you get 24.

3 0
3 years ago
20 POINTS!!!! AND BRAINIEST !!!!
lapo4ka [179]

Answer:

The answer is 2.{5,14}

7 0
3 years ago
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