Mensuration: Surface Area of 3D Shapes (G9)

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Calculate surface areas of cubes, cuboids, cylinders, cones, and spheres. Apply formulas to real-world problems.

Add the two equations: 3x + 5x + 2y - 2y = 10 + 22 => 8x = 32 => x = 4. Substitute into first: 3*4 + 2y = 10 => 12 + 2y = 10 => 2y = -2 => y = -1.

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Trigonometry Basics (G9)

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