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Chapter 5 day 3 with answers
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Chapter 5 day 3 with answers

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Transcript

  • 1. GT Geometry Drill 12/17/13 • Pick up a 2 pieces of patty paper
  • 2. 1. ED, FD, and GD are the perpendicular bisectors of ∆ABC. Find BD. 17 2. JP, KP, and HP are angle bisectors of ∆HJK. Find the distance from P to HK. 3
  • 3. 5.64 5.47 3.95 5.64
  • 4. 7. 8.
  • 5. 7. 8. 42.1 46
  • 6. Find the circumcenter given the following vertices of the triangle
  • 7. Find the circumcenter given the following vertices of the triangle (-3.5, -5)
  • 8. Objectives Apply properties of medians of a triangle. Apply properties of altitudes of a triangle.
  • 9. Vocabulary median of a triangle centroid of a triangle altitude of a triangle orthocenter of a triangle
  • 10. A median of a triangle is a segment whose endpoints are a vertex of the triangle and the midpoint of the opposite side. Every triangle has three medians, and the medians are concurrent.
  • 11. The point of concurrency of the medians of a triangle is the centroid of the triangle . The centroid is always inside the triangle. The centroid is also called the center of gravity because it is the point where a triangular region will balance.
  • 12. An altitude of a triangle is a perpendicular segment from a vertex to the line containing the opposite side. Every triangle has three altitudes. An altitude can be inside, outside, or on the triangle.
  • 13. In ΔQRS, altitude QY is inside the triangle, but RX and SZ are not. Notice that the lines containing the altitudes are concurrent at P. This point of concurrency is the orthocenter of the triangle.
  • 14. vocabulary The midsegment of a triangle - Segment that joins the midpoints of any two sides of a triangle.
  • 15. Triangle Midsegment
  • 16. Theorem The midsegment of a triangle is half the length of, and parallel to, the third side of a triangle.
  • 17. Find the orthocenter of a triangle with the given vertices