Triangles
Concurrent Points
1)
Concurrent points in triangles: http://www.regentsprep.org/Regents/math/geometry/GC3/LConcurrence.htm
2) Medians and altitudes (VIDEO): http://www.youtube.com/watch?v=oiDPGy3tS9A
3) Medians and Altitudes (CLIFFS NOTES): http://www.cliffsnotes.com/math/geometry/triangles/altitudes-medians-and-angle-bisectors
4) Medians & Centroids (VIDEO): http://www.virtualnerd.com/geometry/triangle-relationships/medians-altitudes
5) Perpendicular and Angle Bisectors: http://www.wyzant.com/resources/lessons/math/geometry/triangles/bisectors_of_triangles
6) Perpendicular and Angle Bisectors: http://www.mathwarehouse.com/geometry/similar/triangles/angle-bisector-theorem.php
7) Angle bisectors PRACTICE (easy): http://www.ixl.com/math/geometry/angle-bisectors
8) Perpendicular bisectors LESSON: http://www.algebra.com/algebra/homework/Triangles/Perpendicular-bisectors-of-a-triangle-sides-are-concurrent.lesson
2) Medians and altitudes (VIDEO): http://www.youtube.com/watch?v=oiDPGy3tS9A
3) Medians and Altitudes (CLIFFS NOTES): http://www.cliffsnotes.com/math/geometry/triangles/altitudes-medians-and-angle-bisectors
4) Medians & Centroids (VIDEO): http://www.virtualnerd.com/geometry/triangle-relationships/medians-altitudes
5) Perpendicular and Angle Bisectors: http://www.wyzant.com/resources/lessons/math/geometry/triangles/bisectors_of_triangles
6) Perpendicular and Angle Bisectors: http://www.mathwarehouse.com/geometry/similar/triangles/angle-bisector-theorem.php
7) Angle bisectors PRACTICE (easy): http://www.ixl.com/math/geometry/angle-bisectors
8) Perpendicular bisectors LESSON: http://www.algebra.com/algebra/homework/Triangles/Perpendicular-bisectors-of-a-triangle-sides-are-concurrent.lesson
Congruent Triangles
1) Lessons & Practice: http://www.regentsprep.org/Regents/math/geometry/GP4/indexGP4.htm
2) Video (Khan): https://www.khanacademy.org/math/geometry/congruent-triangles/cong_triangle/v/other-triangle-congruence-postulates
3) Practice: http://www.ixl.com/math/grade-8/congruent-triangles-sss-sas-and-asa
4) Practice: http://www.regentsprep.org/Regents/math/geometry/GP4/Reccontri.htm
5) Lesson/examples: http://www.mathopenref.com/congruenttriangles.html
6) Lesson/examples: http://library.thinkquest.org/20991/geo/ctri.html
7) Lesson/examples: http://www.mathwarehouse.com/geometry/congruent_triangles/
2) Video (Khan): https://www.khanacademy.org/math/geometry/congruent-triangles/cong_triangle/v/other-triangle-congruence-postulates
3) Practice: http://www.ixl.com/math/grade-8/congruent-triangles-sss-sas-and-asa
4) Practice: http://www.regentsprep.org/Regents/math/geometry/GP4/Reccontri.htm
5) Lesson/examples: http://www.mathopenref.com/congruenttriangles.html
6) Lesson/examples: http://library.thinkquest.org/20991/geo/ctri.html
7) Lesson/examples: http://www.mathwarehouse.com/geometry/congruent_triangles/
Isosceles Triangles
1) Isosceles Triangle (SIMULATOR): http://www.mathopenref.com/isosceles.html
2) Explanation: http://www.regentsprep.org/Regents/math/geometry/GP6/Lisosceles.htm
3) PRACTICE: http://www.regentsprep.org/Regents/math/geometry/GP6/PracISOS.htm
2) Explanation: http://www.regentsprep.org/Regents/math/geometry/GP6/Lisosceles.htm
3) PRACTICE: http://www.regentsprep.org/Regents/math/geometry/GP6/PracISOS.htm
Midsegments
1) DEMONSTRATION: http://www.mathopenref.com/trianglemidsegment.html
2) EXPLANATION: http://www.regentsprep.org/Regents/math/geometry/GP10/MidLineL.htm
3) PRACTICE: http://www.regentsprep.org/Regents/math/geometry/GP10/PracMid.htm
2) EXPLANATION: http://www.regentsprep.org/Regents/math/geometry/GP10/MidLineL.htm
3) PRACTICE: http://www.regentsprep.org/Regents/math/geometry/GP10/PracMid.htm
Right Triangles- Click HERE
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Similar Triangles
Solving Triangles (that aren't right triangles)- Click HERE
Triangle Inequalities
MAIN POINT(s) to remember:
1) PRACTICE (IXL)- http://www.ixl.com/math/geometry/pythagorean-inequality-theorems
2) VIDEO- https://www.schooltube.com/video/b05836b3affb4a9c9de3/The%20Pythagorean%20Inequality%20Theorem
- Find (A2 + B2) and compare it to C2.
- If
(A2 + B2) is
GREATER THAN > C2…..
then, it’s ACUTE
- If (A2 + B2) is LESS THAN < C2….. then, it’s OBTUSE
- If (A2 + B2) is EQUAL= C2….. then, it’s RIGHT
1) PRACTICE (IXL)- http://www.ixl.com/math/geometry/pythagorean-inequality-theorems
2) VIDEO- https://www.schooltube.com/video/b05836b3affb4a9c9de3/The%20Pythagorean%20Inequality%20Theorem