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Chapter 11 - AREA

Tools

A	B
A rect	bh (sides)
A sq	s squared
A para.	bh (2)
A triangle	1/2 bh
A trap	1/2h(b1+b2)
Median of Trapezoid	1/2(b1 + b2)
A kite / Rhombus	1/2 d'd2
A eq. tri.	s2/4 times sq. root 3
A reg. Polygon	1/2aP
A circle	Pie R squared
a sector	m arc/360 times pie r squared
A segment	area of sector - area tri.
In similar figures, ratio of areas	A1/A2 = (s1/s2) squared
Hero's Formula	A tri= square root of s(s-a)(s-b)(s-c)
Brahmagupta's Formula	Square root of (s-a)(s-b)(s-c)(s-d)

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