Geometry

Question 1

Formula for

Circumference of Circle:

Answer 1

2(Pi)r

Question 2

The sum of the angles of a triangle is . . . .

Answer 2

180 degrees

Question 3

List the “special” right triangles.

Answer 3

3: 4:5 (sides)
5: 12:13 (sides)

30-60-90 (angles)
45-45-90 (angles)

Question 4

Ratio of sides in a 45-45-90 triangle:

Answer 4

1:1: SqRt(2)

Question 5

Ratio of sides in a 30-60-90 triangle:

Answer 5

1: SqRt(3):2

Question 6

Formula for finding the sum of the interior angles of an n-sided polygon:

Answer 6

(n-2)(180)

Question 7

How to find length of an arc . . .

Answer 7

Ratio of
Arc length to circumference
Equals
Arc degree measure to 360

Question 8

How to find area of a sector. . .

Answer 8

Ratio of
Sector area to circle area
Equals
Sector angle to 360