Answer:
c=-24
Step-by-step explanation:
to find C we have to plug in the coordinate given to us
12(4)+4(-6)+C= 0
48-24+c=0
24+c=0
c=-24
Answer:
64 cm
Step-by-step explanation:
If the perimeter of a square is 32cm. Each side is the same length, and there are 4 sides. 32÷4=8
Each side equals 8. 8•8=64 The area is 64cm.
Explanation:
All of these are done the same way.
1. Set your compass to a distance slightly longer than the distance from the point to the line you want the perpendicular to.
2. Using the point as a center, draw an arc that intersects the line in 2 places. Consider those points to be "P" and "Q".
3. You can leave the compass as is, or set it to any other distance longer than half the distance between P and Q. Using this radius, and using P and Q as centers, draw intersecting arcs on the other side of the line from the original point. Consider the intersection of those arcs to be point "R".
4. A line through the original point and point R will be perpendicular to the line, as you want.
_____
In problem 1, the point and line are obvious.
In problem 2, the point is the vertex opposite the line of interest. (There will be 3 similar constructions.)
The circumference is 26
To find this we must start by finding the radius of the circle. You can find this using the formula for area adjusted to find the radius.
r =
Then when we plug the area in for A, we get the radius to be 13.
We can then use that number in the circumference formula which is below.
C = 2
r
Using that we can find the circumference to be 26
Answer:
y- axis
Step-by-step explanation:
Under a reflection in the y- axis
a point (x, y ) → (- x, y )
Consider the corresponding vertices
A(- 1, - 1 ) → A'(1, - 1 )
B(- 2, - 1 ) → B'(2, - 1 )
C(- 2, - 4) → C'(2, - 4 )
These coordinates satisfy the condition for reflection in the y- axis
