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The formula for finding the area of a triangle is A=(1/2)BxH.
B is the base of the circle and H is the height.

www.virtualnerd.com/pre-algebra/perimeter-area-volume/perimeter-and-area/area/triangle-area-formula

www.khanacademy.org/math/basic-geo/basic-geo-area-and-perimeter/area-triangle/v/intuition-for-area-of-a-triangle

Understand why the formula for the area of a triangle is one half base times height, which is half of the area of a parallelogram.

www.khanacademy.org/math/basic-geo/basic-geo-area-and-perimeter/area-triangle/a/area-of-triangle

The formula for the area of a triangle is 1/2 the base X the height. A = 1/2 b x h . This can also be written as 2A/b = h 2 times the area of the triangle divided by ...

www.mathwarehouse.com/geometry/triangles/area/index.php

Area of a Triangle tutorial. Pictures, examples and many practice problems on how to find the area of a triangle from its base and its height.

www.mathgoodies.com/lessons/vol1/area_triangle.html

Since the area of a parallelogram is A = b x h , the area of a triangle must be one- half the area of a parallelogram. Thus, the formula for the area of a triangle is: ...

mathbits.com/MathBits/TISection/Trig/AreaTrigTri.htm

The formula for the area of a triangle is where b stands for the base and h stands for the altitude (height) drawn to that base.

www.wikihow.com/Calculate-the-Area-of-a-Triangle

The most common way to find the area of a triangle is to take half of the base times the height. Numerous other formulas exist, however, for finding the area of a ...

www.mathsisfun.com/algebra/trig-area-triangle-without-right-angle.html

There's also a formula to find the area of any triangle when we know the lengths ... Depending on which sides and angles we know, the formula can be written in ...

www.mathsisfun.com/geometry/herons-formula.html

You can calculate the area of a triangle if you know the lengths of all three sides, using a formula that has been known for nearly 2000 years. It is called "Heron's ...