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Calculate Area of Triangle ABC

Calculate Area of Triangle ABC
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2015-02-23 22:30
TriangleCoordinate GeometryGeometric Construction
In collections PARCC Math III Unit 5 Lesson 8
This example demonstrates how to calculate the area of any triangle ABC using GeoGebra. Key math concepts include geometric constructions, segment lengths, angle calculations, and area formulas. Construction highlights involve commands like Segment, LineBisector, Line, Intersect, Textfield, and If to draw sides, bisect angles, find intersections, label objects, and apply conditions. Suitable for high school students learning triangle area calculations and geometric transformations.

GeoGebra Commands & Parameters

  1. Segment(A, B) → a
  2. Segment(B, C) → b
  3. Segment(C, A) → c
  4. LineBisector(c) → d
  5. Line(B, d) → e
  6. Intersect(c, e) → D
  7. Segment(B, D) → f
  8. Segment(A, C) → g
  9. Textfield(A) → inputBox1
  10. Textfield(B) → inputBox2
  11. Textfield(C) → inputBox3
  12. Line(A, C) → j
  13. If((1 / Slope[j] * x(B)) + y(B) ≥ 0, "+", "") → signBD
  14. Segment(C_1, A_1) → c_1
  15. Textfield(A_1) → inputBox1_1
  16. Textfield(C_1) → inputBox3_1