Area of A Triangle in 3D

1. The problem statement, all variables and given/known data

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2. Relevant equations

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3. The attempt at a solution

I actually need someone to check my work for 1.1 and 1.2. Is what I have done in 1.3 correct I mean it does not seem right?

Attached Images

	EPSON001.jpg (45.1 KB)
	EPSON002.jpg (36.4 KB)

Attached Files

Homework 1 electromagnetics GLEB.pdf (57.7 KB)

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