Formulas (geometry) Flashcards
(20 cards)
1
Q
the sum of the interior angles of a polygon
A
Sum= (n−2) × 180∘
Where n = number of sides
2
Q
Area of square
A
A= s^2
3
Q
Area of Rectangle
A
A= l x w
4
Q
Area of Parallelogram
A
A= b x h
5
Q
Area of Trapezoid
A
A= ½ (b1+b2) × h
6
Q
Diameter of Circle
A
D= 2r
7
Q
Circumference of Circle
A
C= 2πr or πd
8
Q
Area of Circle
A
A= πr^2
9
Q
Arc Length (circle)
A
Arc Length= θ/360 × 2πr
θ = given central angle
10
Q
Sector Area (circle)
A
Sector Area= θ/360 × πr^2
θ = given central angle
11
Q
Perimeter (square)
A
4S
12
Q
Perimeter (rectangle)
A
2(l+w)
13
Q
Perimeter (triangle)
A
a + b + c
14
Q
Area (triangle)
A
½ × b × h
15
Q
Surface Area (cube)
A
6s^2
16
Q
Surface Area (Rectangular Prism/Box)
A
2lw + 2lh + 2wh
17
Q
Surface Area (Cylinder)
A
2πr^2 + 2πrh
18
Q
Volume (cube)
A
s^3
19
Q
Volume (Rectangular prism/box)
A
l × w × h
20
Q
Volume (cylinder)
A
π r^2 h
