按大小命名角度：几何作图与概念理解

GeoGebra 命令及参数

1. Sequence(Rotate[(0, 2.5), K, Anchor], K, 0, (2 * pi), pi / 36) → rotationPoints
2. Point(rotationPoints) → P2
3. PointToPixels(Corner[1], Corner[3], Corner[5], P2) → onboardingCoords
4. Point(rotationPoints) → P1
5. If(Angle[P2, Anchor, P1] ≤ pi, Angle[P2, Anchor, P1], Angle[P1, Anchor, P2]) → alpha
6. Vector(Anchor, P2) → v
7. Text(("" * alpha), LblPos, false, true, 0, 0) → lblAngle
8. If(alpha < pi / 2, {101 / 255, 87 / 255, 210 / 255}, If[alpha ≟ pi / 2, {218 / 255, 37 / 255, 112 / 255}, If[alpha ≟ pi, {58 / 255, 110 / 255, 214 / 255}, {15 / 255, 133 / 255, 56 / 255}]]) → colorAngle
9. Vector(Anchor, P1) → u
10. Segment(Anchor, Anchor + (3 * UnitVector[u])) → arm1
11. Segment(Anchor, Anchor + (3 * UnitVector[v])) → arm2
12. onboardingTextOffset(Corner[onboardingText, 1], Corner[onboardingText, 3], onboardingCase, Corner[1], Corner[3], Corner[5]) → OnboardingTextOffset
13. circlePixels(P2, 7 + (7 * pulsing), Corner[1], Corner[3], Corner[5]) → pulsingObject
14. Polygon({(-3.25, -3.25), (-3.25, 3.25), (3.25, 3.25), (3.25, -3.25)}) → viewbox
15. Text((("\text{" * If[alpha < pi / 2, "Acute", If[alpha ≟ pi / 2, "Right", If[alpha ≟ pi, "Straight", "Obtuse"]]]) * " angle}"), (0, 3.6), true, true, 0, 0) → textAngleType