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CALCULATE AREA - COMMON SHAPES

RECTANGLE TRIANGLE
= ½BH
H
A = AB
B B
PARALLELOGRAM RIGHT TRIANGLE
= ½BH
A
H
= BH
B B
HEXAGON TRAPEZOID
B
1
= ½H(B +B )
1
2
D
= 0.866 D 2 H
B
2
OCTAGON RING OR ANNULUS
2
= 0.7854 (D - d )
2
D
= 0.828 D 2 D
CIRCLE
SECTOR
2
= R A + 115
D 2
= 0.7854 D
A
(degree)
SEGMENT R

AREA SECTOR -
AREA TRIANGLE ELLIPSE
= 0.7854 AB

¼ ROUND
R B
2
= 0.7854 R A
PARABOLIC SECTION
90 FILLET -
0
D = 2/3 XY X Y
R = 0.215 R 2

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