Geometry Flashcards
1
Q
Right Triangle - side length ratio
A
3: 4: 5 ;
5: 12:13 ;
8: 15:17
7: 24: 25
x: x:x√2 = 45°:45°:90°
x: x√3:2x = 30°:60°:90°
2
Q
Polygon divided into ____ triangles
A
divided into N - 2 triangles
3
Q
Polygon the sum of interior angles?
A
(N-2) (180) = sum of interior angles
4
Q
Perpendicular lines have
A
slopes = negative reciprical
5
Q
Circle circumference
A
C=2 π r
6
Q
Circle area
A
π r squared
7
Q
The diagnal of a square is
A
diagnal = S √2
S= side of the the square
8
Q
Diagnal of a cube
A
diagnal = s √3
s=side
9
Q
height of an equalateral triangle is
A
x/2 * √3
10
Q
an inscribed angle is to the central angle
A
an inscribed angle is 1/2 the central angle it intercepts
11
Q
slope is
A
rise
run
change in y
change in x
