Chapter 10 Flashcards
What is the circumference?
2(pi)r
Is the slogan for remembering the circumference?
Twinkle twinkle little star; circumference is 2(pi)r
What is the area?
(Pi)r^2
What is the slogan for remembering the area?
Fuzzy fuzzy wuzzah bear; area is (pi)r^2
What is the definition of a circle?
Set up all points equal distance from one point, called the centre
What is a minor arc?
And arc with a central angle of less than 180°
What is a major arc?
And arc with the central angle of greater than 180°
What is equivalent to the central angle?
The arc measure
What are concentric circles?
Two circles with the same centre
What is the formula for arc length?
n/360 x 2(pi)r
What is one revolution?
Circumference
What is the formula for finding the area of a sector?
n/360 x (pi)r^2
What is the formula for finding the area of a segment?
n/360 x (pi)r^2 - bh/2
List the degrees of the unit circle starting from 0°.
0°, 30°, 45°, 60°, 90°, 120°, 135°, 150°, 180°, 210°, 225°, 240°, 270°, 300°, 50°, 330°, 360°
List the radians of the unit circle starting from zero.
Zero, (pi)/6, (pi)/4, (pi)/3, (pi)/2, 2(pi)/3, 3(pi)/4, 4(pi)/5, (pi), 7(pi)/6, 5(pi)/4, 4(pi)/3, 3(pi)/2, 5(pi)3, 7(pi)4, 11(pi)/6
List the gradients in order starting from zero.
(1,0); (the square root of 3/2, 1/2); (the square root of 2/2, the square root of 2/2); (1/2, the square root of 3/2); (0,1); (-1/2, the square root of 3/2); (the square root of -2/2, the square root of 2/2); (the square root of -3/2, 1/2); (-1,0); (the square root of -3/2, -1/2); (the square root of -2/2, the square root of -2/2); (-1/2, the square root of -3/2); (0,-1); (1/2, the square root of -3/2); (the square root of 2/2, the square root of -2/2); (the square root of 3/2, -1/2)
What is the perimeter?
The distance around a figure
