Find the area of the triangle whose two sides from one vertex are 2î+ĵ and î+3ĵ.
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Question

Find the area of the triangle whose two sides from one vertex are 2î+ĵ and î+3ĵ.

G1 Physics · Accepted Answer

Cross-product magnitude=|2×3−1×1|=5. Triangle area=1/2×5=5/2.