Geometry- Finding The Area Flashcards
straight line drawn between two points on a circle
Chord
: the length of a straight line through the center of an object or space.
Diameter
Pytagorean theorem
a^2+b^2=c^2
Diameter of a circle formulas
2r
Circumference formula circle
2piR
Area of a circle
PiR^2
Square perimeter
4s
Area square
S^2
Rectangle area
Lw
Rectangle perimeter
2L+2W
Triangle area?
1/2 bh
Equalateral triangle formula
A= squareroot of 3/4 S^2
Area of a portion in a circle
(0/360) Pir^2
Area in a half circle
A= 1/2 pir^2
Area of parallelogram
A=bh
Area of a trapezoid
A= 1/2(b1+b2) h
Rhombus area
A= 1/2 d1 d2
Triangle with a given angle and not a right triangle
A= 1/2 ab sin c
Scalene triangle
S= a+ b+ c/ 2
Area of scalene triangle
A= squareroot S(S-a)(S-b)(s-c)
Area of a circle with right triangle
As= Acircle - AT
=PI R^2 - 1/2 bh
