Geometry Flashcards
1
Q
Formula for
Circumference of Circle:
A
2(Pi)r
2
Q
The sum of the angles of a triangle is . . . .
A
180 degrees
3
Q
List the “special” right triangles.
A
3: 4:5 (sides)
5: 12:13 (sides)
30-60-90 (angles)
45-45-90 (angles)
4
Q
Ratio of sides in a 45-45-90 triangle:
A
1:1: SqRt(2)
5
Q
Ratio of sides in a 30-60-90 triangle:
A
1: SqRt(3):2
6
Q
Formula for finding the sum of the interior angles of an n-sided polygon:
A
(n-2)(180)
7
Q
How to find length of an arc . . .
A
Ratio of
Arc length to circumference
Equals
Arc degree measure to 360
8
Q
How to find area of a sector. . .
A
Ratio of
Sector area to circle area
Equals
Sector angle to 360
