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Brainly264
26.12.2020 •
Mathematics
What is the perimeter of the triangle in units of the triangle formed by the points (-3,1), (-3,5), and (4,1)?
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Ответ:
let's say
A(-3,1) B(-3,5) C(4,1)
we need to find the perimeter of ABC for that we find each of the sides
AB BC and AC
there is a formula to find the distance between 2 poins
let's say that a point has the structure A(x1,y1) where x=-3 and y=1 and B(x2,y2) where x2=-3 and y2=5
AB=![\sqrt{(x2-x1)^2+(y2-y1)^2}](/tpl/images/1007/7883/aae60.png)
AB=![\sqrt{(-3+3)^2+(5-1)^2}](/tpl/images/1007/7883/39ef5.png)
AB=![\sqrt{0^2+4^2}](/tpl/images/1007/7883/c503a.png)
AB=4
we do the same thing for AC and BC
AC=![\sqrt{(4+3)^2+(1-1)^2}](/tpl/images/1007/7883/d1315.png)
AC=![\sqrt{7^2+0^2}](/tpl/images/1007/7883/8a75c.png)
AC=7
BC=![\sqrt{(4+3)^2+(1-5)^2}](/tpl/images/1007/7883/2e0f7.png)
BC=![\sqrt{7^2+(-4)^2}](/tpl/images/1007/7883/26983.png)
BC=![\sqrt{49+16}](/tpl/images/1007/7883/d446c.png)
BC=![\sqrt{65}](/tpl/images/1007/7883/7738b.png)
The perimeter is equal to the sum of the sides
P=AB+AC+BC=4+7+
=11+![\sqrt{65}](/tpl/images/1007/7883/7738b.png)
Ответ:
The formula is; radius^2 • angle /2
so if you input values
14^2 = 196
315° = 5.4977
so 196•5.4977 =1077.55
1077.55/2= 538.8