Analytic geometry

Angles

Area

Circles

Pi, radius

Cones

Congruence

Cosine

law of cosines, trigonometry, two sides of a triangles, three sides of triangles, cosine theory, cosine theorm, cosine rule, property rights, necessary evil, tragedy of commons, Quadrant 4, tangents, negative cosines

Cylinders

Ellipse

Geometry

secret geometry, mathematicians, geometers

Hyperbola

Lines

Measuring circles

Pi, radius

Parabola

parabolic curves

Perimeters

Pythagorean theorem

Ray optics

Geometrical optics, geometry

Right triangles

Rotation

Shapes

Similarity

Sine

Slope

Solid geometry

Spheres

hemispheres, atmospheres, C.S.A of a sphere is 4𝜋𝑟2 therefore C.S.A of a hemisphere is 2𝜋𝑟2.
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Surface area

Tangent

Transformations

Triangles

Trigonometric equations

trigonometry equations, trigonometry ratios

Trigonometric functions

trigonometry functions

Trigonometric identities

trigonometry identity, trigonometry identities

Trigonometric ratios

trigonometry ratios

Trigonometry with general triangles

angular triangles

Volume