First, let's find the equation of this line in the slope-intercept form, y = mx + b, in order to be able to graph this line.
By using the point-slope form we have:
(y - y1) = m(x - x1) using the point (3, 6) and slope, m = -5;
(y - 6) = -5(x - 3)
y - 6 = -5x + 15 add 6 to both sides;
y = -5x + 21
21 is the y- intercept, so we obtain another point, (0, 21)
By graphing the line with equation y = -5x + 21 we can find the zero of this function, which is the x-intercept. In our case x-intercept is 4.2 (you can use your calculator to find this x- intercept). Or you can make y equal to 0, and solve the equation 0 = -5x + 21 for x.
0 = -5x + 21 subtract 21 to both sides;
-21 = -5x divide by -5 to both sides;
4.2 = x
Now you can see that a right triangle is formed on the first quadrant, with length sides 21 and 4.2. Now you are able to find the area of this right triangle.
A = (1/2)(21)(4.2) = 44.1
include #include#includevoid main(){int a,b,c:float s,A,x=1/2;clrscr();printf(" three sides of a triangle\n");scanf("%d %d %d",&a,&b,&c);s=(a+b+c)/2;A=pow((s(s-a)(s-b))(s-c)),x);printf("AREA OF TRIANGLE:%d\n"'A);gech();}
Triangular numbers enumerate the items that can be arranged in a triangle. For example, ten blowling pins (10 is 4 triangled) and fifteen bowling pins (15 is 5 triangled). Applications might include counting band members in a triangle formation, or napkins in a triangle pattern at a wedding. - Bill
100x2=200 200 divided by 25 = 8 Answer = 8 (The 8 would not have a squared sign just '8 feet') (apex) 59.5
For a triangle to exist, the sum of the two shorter sides must be longer than the longest side. If 15 is the longest side, then the other, missing, shorter side must be greater than 15 - 4 = 11. If the third, missing, side is the longest side, then it must be less than 15 + 4 = 19 So the third side is any length greater than 11 and less than 19. Examples include 12, 13, 15, 11.5, 18.5.
The property you can use here is that no side can be longer than the sum of the other three sides. Thus, the third side must be somewhere between 22 - 5, and 22 + 5 (the "between", in this case, is not inclusive, i.e., it doesn't include the endpoints).
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