| Share

Finding Area


A = a2, in which a is one of the sides.


A = ab, in which a is the base and b is the length.


A = bh, in which b is the base and h is the height.


A = πr2, in which π is 3.1416 and r is the radius.


A = πr1r2, in which π is 3.1416, r1 is the longer radius, and r2 is the shorter radius.


A = (h[b1 + b2])/2, in which h is the height, b1 is the longer parallel side, and b2 is the shorter parallel side.


Given base and height: A = (1/2)bh, in which b is the base and h is the height.

Given side, angle, side (SAS): (1/2) ab x sinθ, in which a is one side, b is another side, and θ is the known angle.

Given three sides: square root of (s[s-a][s-b][s-c]) when s = (a + b + c)/2 (Heron's formula), in which a, b, and c represent the three sides.

Information Please® Database, © 2007 Pearson Education, Inc. All rights reserved.

TrianglesNumbers and FormulasFinding Volume

More on Finding Area from Infoplease:

Premium Partner Content
HighBeam Research
Documents Images and Maps Reference
(from Newspapers, Magazines, Journals, Newswires, Transcripts and Books)

Research our extensive archive of more than 80 million articles from 6,500 publications.

Additional search results provided by HighBeam Research, LLC. © Copyright 2005. All rights reserved.

24 X 7

Private Tutor

Click Here for Details
24 x 7 Tutor Availability
Unlimited Online Tutoring
1-on-1 Tutoring