Using your knowledge of circles, label the following on the given diagram: chord, tangent, radius, secant, point of tangency and
diameter. Name a minor arc and a major arc.
1 answer:
The purple line is tangent. Tangent line intersects a circle in only 1 point
The yellow dot is the point of tangency. It is the point where tangent line touches the circle
The light blue line is secant. Secant line intersects a circle in 2 points
The red line is the radius. Radius is the distance from center to the outer rim of the circle.
The green line is the diameter. It is the line passing through the center of a circle. It measures twice the radius
The gray line is the chord. Chord is the line whose endpoints lie on the circle.
Arc AB is a minor arc
Arc ABCD is a major arc
The yellow dot is the point of tangency. It is the point where tangent line touches the circle
The light blue line is secant. Secant line intersects a circle in 2 points
The red line is the radius. Radius is the distance from center to the outer rim of the circle.
The green line is the diameter. It is the line passing through the center of a circle. It measures twice the radius
The gray line is the chord. Chord is the line whose endpoints lie on the circle.
Arc AB is a minor arc
Arc ABCD is a major arc
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1) Parallel line:
2) Rectangle
3) Perpendicular line:
4) x-coordinate: 2.7
5) Distance:
6) 3/8
7) Perimeter: 12.4 units
8) Area: 8 square units
9) Two slopes of triangle ABC are opposite reciprocals
10) Perpendicular line:
Step-by-step explanation:
1)
The equation of a line is in the form
where m is the slope and q is the y-intercept.
Two lines are parallel to each other if they have same slope m.
The line given in this problem is
So its slope is . Therefore, the only line parallel to this one is the line which have the same slope, which is:
Since it also has
2)
We can verify that this is a rectangle by checking that the two diagonals are congruent. We have:
- First diagonal:
- Second diagonal:
The diagonals are congruent, so this is a rectangle.
3)
Given points A (0,1) and B (-2,5), the slope of the line is:
The slope of a line perpendicular to AB is equal to the inverse reciprocal of the slope of AB, so:
And using the slope-intercept for,
Using the point we find:
And re-arranging,
4)
The endpoints of the segment are X(1,2) and Y(6,7).
We have to divide the sgment into 1/3 and 2/3 parts from X to Y, so for the x-coordinate we get:
5)
The distance between two points and
is given by
In this problem, the two points are
E(3,1)
F(4,7)
So the distance is given by
6)
We have:
A(3,4)
B(11,3)
Point C divides the segment into two parts with 3:5 ratio.
The distance between the x-coordinates of A and B is 8 units: this means that the x-coordinate of C falls 3 units to the right of the x-coordinate of A and 5 units to the left of the x-coordinate of B, so overall, the x-coordinate of C falls at
of the distance between A and B.
7)
To find the perimeter, we have to calculate the length of each side:
So the perimeter is
p = 3.6 + 3.2 + 2 + 3.6 = 12.4
8)
The area of a triangle is
For this triangle,
Base = XW
Height = YZ
We calculate the length of the base and of the height:
So the area is
9)
A triangle is a right triangle when there is one right angle. This means that two sides of the triangle are perpendicular to each other: however, two lines are perpendicular when their slopes are opposite reciprocals. Therefore, this means that the true statement is
"Two slopes of triangle ABC are opposite reciprocals"
10)
The initial line is
A line perpendicular to this one must have a slope which is the opposite reciprocal, so
Using the slope-intercept form,
And using the point
we find:
Learn more about parallel and perpendicular lines:
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