# Triangular Plot

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• Sep 27th 2008, 05:24 AM
magentarita
Triangular Plot
A triangular plot of land has sides that measure 5 meters, 7 meters,and 10 meters. What is the area of this plot of land, to the
nearest tenth of a square meter?

• Sep 27th 2008, 06:04 AM
mr fantastic
Quote:

Originally Posted by magentarita
A triangular plot of land has sides that measure 5 meters, 7 meters,and 10 meters. What is the area of this plot of land, to the
nearest tenth of a square meter?

Many ways of doing it. Here're two:

1. Heron's Formula: Heron's formula - Wikipedia, the free encyclopedia

2. Use the cosine rule to get an angle. Then use the area formula Area $= \frac{1}{2} a b \sin C$.
• Sep 27th 2008, 10:36 PM
magentarita
great
Quote:

Originally Posted by mr fantastic
Many ways of doing it. Here're two:

1. Heron's Formula: Heron's formula - Wikipedia, the free encyclopedia

2. Use the cosine rule to get an angle. Then use the area formula Area $= \frac{1}{2} a b \sin C$.

Thanks again.