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Q3. Some commonly used symbols, formulae and metric measures

Mathematics

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The triangles in the image appear to be geometry problems, but they are incomplete as no specific question is asked. For Q3, here are some commonly used symbols, formulae, and metric measures.

Commonly used symbols include π\pi (pi) for ratios in circles, θ\theta (theta) for angles, and Σ\Sigma (sigma) for summation. Important formulae are the area of a circle A=πr2A = \pi r^2, the Pythagorean theorem a2+b2=c2a^2 + b^2 = c^2, and Newton's second law F=maF = ma. Standard metric measures include the meter (m) for length, kilogram (kg) for mass, and liter (L) for volume.

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