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What is the area of the triangle? Round to the nearest tenth.

 Apr 18, 2020
 #1
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Hi, I can't seem to see the picture of the triangle...

 Apr 18, 2020
 #2
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Find the area

 Apr 18, 2020
 #3
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Obtuse scalene triangle.

Use the Law of Cosines to find the 3rd side c =5.273

Sides: a = 4   b = 7.3   c = 5.273

 

Once you have ALL 3 sides, then you can use Heron's Formula

to calculate the area of the triangle.[Look it up in your Textbook]



Area: T = 10.275
Perimeter: p = 16.573
Semiperimeter: s = 8.286

 Apr 18, 2020
 #4
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The third angle is 45°        (  180 - 103 - 32 = 45 )

 

The height of the triangle     h = sqrt(16/2) = 2.828427125

 

Area of the triangle        A = ( h * 7.3 )/2   =  10.323759 cm²  indecision

 Apr 18, 2020

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