Circles
which letters are used to tell us the middle of a circle?
(h,k)
What is a parallel line?
A line that never intersects the line it is parallel with.
What is the name of any shape with four sides?
A quadrilateral
what is the area of a rectangle with a length of 4 and a height of 7?
28
What is the formula for the area of a rectangle?
base x height
what is half of the diameter called?
the radius
A line that makes a 90 degree angle with the line it is perpendicular with.
A rectangle's angle has how many degrees?
90 degrees
What is the area of a triangle with base of 8 and height of 10?
80
What is the formula for the perimeter of a circle?
πd or 2πr
Given the equation: (x-3)2 + (y-1)2 = 4
what is the radius?
2
What is the midpoint of the line segment with points at:
(4,6)
(8,0)
the midpoint is:
(6,3)
How many pairs of parallel sides does a parallelogram have?
1 pair of parallel sides.
A parallelogram has a height of 9 and a base of 13. what is its area?
117
What is the formula for the area of a circle?
Area = πr2
Given the circle equation: (x+4)2 + (y-3)2 = 16
Where is the center?
(-4,3)
Find the midpoint of the following points:
(3,0)
(-4,-2)
The midpoint is:
(-0.5,-1)
they must all be congruent
what is the area of a circle with radius of 15?
225π
or
706.86
What is the midpoint formula?
( (x2 + x1)/2 , (y2 + y1)/2 )
A circle has radius 4. What is the arc length of a 90 degree sector of the circle?
2π or 6.28
Find the distance between the two points:
(-3,5)
(0,1)
5
All squares are rectangles.
And all squares/rectangles are also a kind of this other quadrilateral.
a parallelogram
What is the total area of:
A square with a side length of 3
and a triangle with a base of 2 and a height of 6?
square: 9
triangle: 6
total: 15
What is the distance formula?
distance = square root[(x2-x1)2 + (y2-y1)2]