Circumference & Area of Circles
What is the formula for the circumference of a circle?
Answer: C=2πr
hat can you say about opposite sides of a parallelogram?
They are parallel and congruent
What is the sum of the interior angles of a triangle?
180°
Which trig ratio is opposite over hypotenuse?
Sine
What is the formula for slope?
m=x2−x1/y2−y1
What is the formula for the area of a circle?
Answer: A= πr2
What can you say about opposite angles of a parallelogram?
They are congruent
What is the formula for the sum of the interior angles of an n-sided polygon?
(n−2)×180
Which trig ratio is adjacent over hypotenuse?
Cosine
Find the slope between points (2, 3) and (6, 7).
1
Find the circumference of a circle with radius 5
10π
What is the sum of consecutive angles in a parallelogram?
180°
Find the sum of the interior angles of a pentagon.
540°
Which trig ratio is opposite over adjacent?
Tangent
What is the midpoint formula?
(x1+x2)/2, (y1+y2)/2
Find the area of a circle with radius 6
36π
What do the diagonals of a parallelogram do to each other?
They bisect each other
What is the sum of the exterior angles of any polygon?
360°
If opposite = 3 and hypotenuse = 5, find sin(θ).
3/5
Find the midpoint of (2, 4) and (6, 8).
(4, 6)
A circle has a diameter of 14. Find the area.
49π
If one angle of a parallelogram measures 68°, what is the measure of an adjacent angle?
112°
Find the sum of the interior angles of an octagon.
1080°
If adjacent = 4 and opposite = 3, find tan(θ).
3/4
Find the distance between (1, 2) and (4, 6).
5