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Circles Formulas (Geometry) Flashcards | StudBud
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Circles Formulas (Geometry)
Circles Formulas (Geometry)
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Answers
1
sum exterior angle
360
(n-2) x 180/ n
360/n
(n-2) x 180
2
how to solve for the angle or an arc in this photo
times 2 or divided by 2
Supplementary
mArc1 + mArc2 / 2 = angle 1
3
Volume of Prism
1/3 (πr2 h)
Bh
Pl
1/3 (bh)
4
Cone LA
1/2 (p x l)
2πrh
πrl
2π(r2)
5
Relation between the Arc and Angle in this photo
Supplementary
times 2 or divided by 2
mArc1 - mArc2 / 2 = angle 1
mArc1 - mArc2 / 2 = angle 1
6
Volume of hemisphere
2πr3/3
2πr2
2πrh
3πr2
7
Volume of sphere
4πr2
2πr3/3
πr3/4
4πr3/3
8
Prism LA
Pl
Bh
Ph
2πrl
9
center
AB
CA, CD, CB
EF, AD, AB
C
10
triangle
s2 √3/4
1/2(bh)
bh
1/2 h (d1 d2 )
11
kite/rhombus
bh
1/2 h (d1 d2 )
1/2(bh)
s2 √3/4
12
regular polygon
1/2 h (d1 d2 )
s2 √3/4
1/2(bh)
1/2 (aP)
13
Pyramid SA
1/2 PL
Ph+2b
1/3 PL
1/2 pl + B
14
how do you find out
x
?
outside pt x whole = tangent2
part1 + part2 Chord 1 = part1 + part2 chord 2
outside pt x whole = outside pt x whole
Tangent = Tangent
15
how to solve for the angle or an arc in this photo
times 2 or divided by 2
mArc1 + mArc2 / 2 = angle 1
Supplementary
16
Volume of cone
2π(r2)
4π(r3)/3
Bh
1/3 (πr2 h)
17
circumfrence
Bh
2πr
πr2
2πrh
18
SA of hemisphere
2πr2/3
2πr2
3πr2
2πrh
19
Cylinder LA
π(r2)h
2πrh
2Bπ
Ph
20
Length of arc
mArc/360 x 2πr
2πr
(mArc/360 x πr2)
(mArc/360 x πr2) - b x h/2
21
Cone SA
1/3 (bh)
3πr
2πrh
πrl + π(r2)
22
Area of Sector
2πr
(mArc/360 x πr2) - b x h/2
(mArc/360 x πr2)
mArc/360 x 2πr
23
Tangent
AB
EF, AD, AB
EF<-->
GH-->
24
how do you find out
x
?
part1 + part2 Chord 1 = part1 + part2 chord 2
outside pt x whole = outside pt x whole
Tangent = Tangent
outside pt x whole = tangent2
25
how do you find out
x
?
Tangent = Tangent
outside pt x whole = outside pt x whole
outside pt x whole = tangent2
part1 + part2 Chord 1 = part1 + part2 chord 2
26
each exterior angle
360
(n-2) x 180/ n
(n-2) x 180
360/n
27
Volume of Pyramid
Pl
Bh
1/3(Bh)
28
Chord
C
EF, AD, AB
CA, CD, CB
AB
29
Radius
EF, AD, AB
C
CA, CD, CB
AB
30
Relation between the Arc and Angle in this photo
mArc1 - mArc2 / 2 = angle 1
mArc1 - mArc2 / 2 = angle 1
times 2 or divided by 2
Supplementary
31
each interior angles
360
360/n
(n-2) x 180
(n-2) x 180/ n
32
Volume of cylinder
Bh
πr2 h
1/3 (bh)
33
sum of interior angles
(n-2) x 180
(n-2) x 180/ n
360/n
360
34
Prism SA
Pl
2πrl
Ph + 2B
Ph
35
Area of a circle
2πrh
πr2
Bh
2πr
36
LA of hemisphere
2πr2
2πrh
3πr2
2πr3/3
37
Cylinder SA
Ph
2πrh + 2πr2
2πrh
πr2h
38
rectangle/ square/ parallelogram
bh
1/2 h (d1 d2 )
s2 √3/4
1/2(bh)
39
diameter
CA, CD, CB
AB
C
EF, AD, AB
40
Area of of highlighted segment
(mArc/360 x πr2) - b x h/2
mArc/360 x 2πr
2πr
(mArc/360 x πr2)
41
Secant
EF, AD, AB
GH-->
AB
EF<-->
42
SA of sphere
2πr3/3
4πr2
4πr3/3
πr3/4
43
equilateral triangle
bh
1/2(bh)
1/2 h (d1 d2 )
s2 √3/4
44
how do you find out
x
?
part1 + part2 Chord 1 = part1 + part2 chord 2
Tangent = Tangent
outside pt x whole = tangent2
outside pt x whole = outside pt x whole
45
Circumference of circle
2πr
mArc/360 x 2πr
(mArc/360 x πr2) - b x h/2
(mArc/360 x πr2)
46
Pyramid LA
1/2 PL
1/3 PL
Ph
Ph+2b
