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Orthocenter Outside the Obtuse Triangle problems
Centroid Circumcenter Incenter Orthocenter properties example question
In the following video you will learn how to find the coordinates of the Orthocenter located outside the triangle in the standard xy-plane (also known as coordinate plane or Cartesian plane). In acute and right triangles, the Orthocenter does not fall outside of the triangle. However, when the triangle in question is obtuse, that is, when one of its interior angles measures more than 90 degrees – the Orthocenter will be located outside the triangle. This is when you will need to understand the technique used to find its coordinates.
Solution to this Orthocenter in Obtuse Triangle Geometry practice problem is provided in the video below!
Two Column Geometry Proof problems
Two Column Geometry Proof Intersecting Lines example problem
Given: GA = RA, AH = AT
Prove: GT is congruent to RH
Solution to this Two Column Geometric Proof practice problem is given in the video below!
Two Column Geometry Proof Trapezoid example
Given: AD = 8, BC = 8, and BC is congruent to CD
Prove: AD is congruent to CD
Solution to this Two Column Geometric Proof practice problem is given in the video below!
Two Column Geometry Proof Circle example question
Given: 
is a diameter
Prove: (CD)2 = (AD)(DB)
Solution to this Two Column Geometric Proof practice problem is given in the video below!
Two Column Geometry Proof Triangle example problem
Given: 
Prove: 
Solution to this Two Column Geometric Proof practice problem is given in the video below!
Two Column Geometry Proof Triangle example #2
Given: 
with 
the bisector of 
Prove: BFDE is a rhombus
Solution to this Two Column Geometric Proof practice problem is given in the video below!
Two Column Geometry Proof Circle example question #2
Given: Circle with center O and diameter
Prove: 
Solution to this Two Column Geometric Proof practice problem is given in the video below!
Two Column Geometry Proof Kite example problem
Given: Kite ABCD with 
E, F, G, H are midpoints of 
Prove: EFGH is a rectangle
Solution to this Two Column Geometric Proof practice problem is given in the video below!
Two Column Geometry Proof Triangle example #3
Given: 
bisects 
is a perpendicular bisector of
Prove: 
Solution to this Two Column Geometric Proof practice problem is given in the video below!
Two Column Geometry Proof Triangle example question #4
Given: is isosceles and 
Prove: 
Solution to this Two Column Geometric Proof practice problem is given in the video below!
Two Column Geometry Proof Parallel Lines Transversal Triangle example problem
Given: 
bisects 
bisects 
Prove: 
Solution to this Two Column Geometric Proof practice problem is given in the video below!
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