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There are several different special lines for triangles There are several different special lines for triangles midsegment There are several different special lines for triangles midsegment altitude There are several different special lines for triangles midsegment altitude median There are several different special lines for triangles midsegment altitude perpendicular bisector median There are several different special lines for triangles midsegment altitude perpendicular bisector median angle bisector There are several different special lines for triangles Each of these has its own defintion midsegment altitude perpendicular bisector median angle bisector A midsegment of a triangle A midsegment of a triangle A B C Begins at the midpoint of a side A midsegment of a triangle A B C midpoint Begins at the midpoint of a side A midsegment of a triangle A B C Begins at the midpoint of a side and goes to the midpoint A midsegment of a triangle of another side A B C Begins at the midpoint of a side and goes to the midpoint A midsegment of a triangle of another side A B C midpoint Begins at the midpoint of a side and goes to the midpoint A midsegment of a triangle of another side A B C Begins at the midpoint of a side and goes to the midpoint A midsegment of a triangle of another side A midsegment B C If DE is a midsegment then AD ≅ ? EC BE DB BC A D B E C If DE is a midsegment EC = A D B 3 E C The midsegment has 2 special properties A D B E C The midsegment has 2 special properties it is parallel to the third side A D B E C The midsegment has 2 special properties it is parallel to the third side A D B E C The midsegment has 2 special properties it is parallel to the third side A D B E C The midsegment has 2 special properties and half the third side it is parallel to the third side A D B E C The midsegment has 2 special properties and half the third side it is parallel to the third side A D 10 B E C The midsegment has 2 special properties and half the third side it is parallel to the third side A D 10 5 B E C A D 50 B E C A D 15 B E C An altitude of a triangle A B C An altitude of a triangle starts at a vertex A B C An altitude of a triangle starts at a vertex A vertex B C and is perpendicular to the opposite side An altitude of a triangle starts at a vertex A B C and is perpendicular to the opposite side An altitude of a triangle starts at a vertex A B C and is perpendicular to the opposite side An altitude of a triangle starts at a vertex A B C altitude BD is perpendicular to... AC BC AB DB A D B C ∡BDA = ∡BDC = ∘ ∘ A D B C CE is perpendicular to... AC BC AB DB A E D B C All the altitudes meet at a point called the orthcenter A E D B C All the altitudes meet at a point called the orthcenter A E D B C All the altitudes meet at a point called the orthcenter A E D B C A median of a triangle A B C starts at the vertex A median of a triangle A vertex B C starts at the vertex A median of a triangle and goes to the midpoint of the opposite side A B C starts at the vertex A median of a triangle and goes to the midpoint of the opposite side A midpoint B C starts at the vertex A median of a triangle and goes to the midpoint of the opposite side A B C starts at the vertex A median of a triangle and goes to the midpoint of the opposite side A B C median BC AB AD AC If BD is a median then DC ≅ ? A D B C If BD is a median how long is AD? AD = A D 6 B C All the medians meet at a point called the Centroid A D B C All the medians meet at a point called the Centroid A D B C All the medians meet at a point called the Centroid A D B C All the medians meet at a point called the Centroid A D B C Altitudes meet at Medians meet at Orthocenter ? Centroid ? The centroid has 1 special property A D B C The centroid has 1 special property the short part of the median A D B C The centroid has 1 special property the short part of the median shortpart A D B C The centroid has 1 special property the short part of the median is half the long part A D B C The centroid has 1 special property the short part of the median is half the long part A D B C long part The centroid has 1 special property the short part of the median is half the long part A D 20 B C The centroid has 1 special property the short part of the median is half the long part A 10 D 20 B C The centroid has 1 special property the short part of the median is half the long part A D 12 B C The centroid has 1 special property the short part of the median is half the long part A 2 D B C A perpendicular bisector A B C A perpendicular bisector start at the midpoint of a side A midpoint B C A perpendicular bisector and is perpendicular start at the midpoint to that side of a side A B C A perpendicular bisector and is perpendicular start at the midpoint to that side of a side A B C A perpendicular bisector and is perpendicular start at the midpoint to that side of a side A B perpendicular C bisector DE is a perpendicular bisector How long is AD? AD = A D E 8 B C DE is a perpendicular bisector ∡EDA = ∘ A D E B C median ? altitude ? perpendicular bisector ? midsegment ? Perpendicular bisectors meet at a point called the A D B C circumcenter Perpendicular bisectors meet at a point called the A D B C circumcenter Perpendicular bisectors meet at a point called the A D B C circumcenter Perpendicular bisectors meet at a point called the A D B C circumcenter The circumcenter is the same distance from each of the A D B C vertices The circumcenter is the same distance from each of the A D B C vertices The circumcenter is the same distance from each of the A D B C vertices The circumcenter is the same distance from each of the A D B C vertices and a circle can The circumcenter is the same distance from each of the be circumscribed around the triangle A D B C vertices and a circle can The circumcenter is the same distance from each of the be circumscribed around the triangle A D B C vertices Medians meet at Perpendicular bisectors meet at Altitudes meet at centroid ? orthocenter ? circumcenter ? An angle bisector A B C An angle bisector starts at a vertex A B C An angle bisector starts at a vertex A vertex B C An angle bisector starts at a vertex and bisects the angle A B C An angle bisector starts at a vertex and bisects the angle A B C An angle bisector starts at a vertex and bisects the angle A B angle bisector C ∡ABD = ∡CBD = ∡ABC = 70 ∘ ∘ ∘ A D B C ∡ABD = ∡CBD = ∡ABC = 70 ∘ ∘ ∘ A D B C ∡ABD = ∡CBD = 20 ∡ABC = ∘ ∘ ∘ A D B C The angle bisectors meet at a point called the A B C incenter The angle bisectors meet at a point called the A B C incenter The angle bisectors meet at a point called the A B C incenter The angle bisectors meet at a point called the A B C incenter the incenter is equal The angle bisectors meet at a point called the distance from the sides A B C incenter the incenter is equal The angle bisectors meet at a point called the distance from the sides A B C incenter the incenter is equal The angle bisectors meet at a point called the distance from the sides A B C incenter a circle can the incenter is equal The angle bisectors meet at a point called the be drawn INSIDE distance from the triangle the sides A B C incenter a circle can the incenter is equal The angle bisectors meet at a point called the be drawn INSIDE distance from the triangle the sides A B C incenter altitude midsegment median perpendicular bisector angle bisector Fill in the missing information midpoint ? vertex vertex ? midpoint vertex Starts opposite side ? midpoint midpoint Ends |