Orthocenter of Triangle
Illustration to show altitudes in a triangle. It is known as the orthocenter.
Bisected Angle
Illustration to show that if an angle is bisected, and if a line drawn through the vertex perpendicular…
Bisected Angles
Illustration to show that the bisectors of two supplementary adjacent angles are perpendicular to each…
Bisected Angle
Illustration to show that the bisector of one of two vertical angles bisects the other.
Bisected Angles
Illustration to show that the bisector of two pairs of vertical angles formed by two intersecting lines…
Bisected Vertical Angle of an Isosceles Triangle
Illustration to show that the bisector of the vertical angle of an isosceles triangle bisects the base,…
Perpendicular Bisector of the Base of an Isosceles Triangle
Illustration to show that the perpendicular bisector of the base of an isosceles triangle passes through…
Bisector of an Exterior Angle of an Isosceles Triangle
Illustration to show that the bisector of an exterior angle of an isosceles triangle, formed by producing…
Leg Produced through the Vertex of an Isosceles Triangle
Illustration to show that if one of the legs of an isosceles triangle is produced through the vertex…
Angle Bisector Drawn Parallel to A Side
Illustration to show that if through any point in the bisector of an angle a line is drawn parallel…
Midpoints of Triangle Divide Triangle into Four Equal Triangles
Illustration to show that if the lines joining the middle points of the sides of a triangle divide the…
Altitudes Drawn from Base Angles of Isosceles Triangles
Illustration to show altitudes drawn from base angles of an isosceles triangle.
Medians Drawn Drawn to Legs of Isosceles Triangles
Illustration to show the medians drawn to the legs of an isosceles triangle.
Perpendiculars Dropped From Midpoint of Base to Legs of Isosceles Triangles
Illustration to show the perpendiculars dropped from the midpoint of the base to the legs of an isosceles…
Point in Base of Isosceles Triangle
Illustration to show that the difference of the distances from any point in the base produced of an…
Perpendiculars Dropped Any Point in the Equilateral Triangle
Illustration to show the perpendiculars dropped from any point in the equilateral triangle to the three…
Triangle With Bisectors of Vertical Angles
Illustration to show the bisector of the vertical angle A of a triangle ABC, and the bisectors of the…
Triangle With Bisectors of Base Angles
Illustration to show if the bisector of the base angles of a triangle are drawn, and through their point…
Triangle With Bisector and Perpendicular From Vertex Drawn
Illustration to show the bisector of the vertical angle of a triangle makes with the perpendicular from…
Circle with Segment, Semicircle, Sector, Quadrant, and Central Angle
Illustrations of a circle with segment, semicircle, sector, quadrant, and central angles drawn.
Circle with Arc, Chord, Inscribed Angle, Circumscribed Polygon
Illustrations of a circle with arc, chord, inscribed angle, and circumscribed about a polygon.
Circle With Two Tangents Drawn From an External Point
Illustration of a circle which illustrates that the tangents to a circle drawn from an external point…
Circles With Inscribed Angles
Illustration of equal circles to show that an inscribed angle is measured by half the arc intercepted…
Circle With Inscribed Right Angle in Semicircle
Illustration of a circle with a right angle inscribed in a semicircle.
Circle With Inscribed Angle Greater Than Semicircle
Illustration of a circle with an angle inscribed in a segment greater than a semicircle, an acute angle.
Circle With Inscribed Angle Less Than Semicircle
Illustration of a circle with an angle inscribed in a segment less than a semicircle, an obtuse angle.
Circle With Two Intersecting Chords
Illustration of a circle with two intersecting chords within the circumference. The angle formed is…
Circle With Chord and Tangent
Illustration of a circle showing an angle included by a tangent and a chord drawn from the point of…
Circles With Angles Formed by Secants and Tangents
Illustration showing angles formed by two secants, two tangents, or a tangent and a secant, drawn to…
Positive and Negative Arcs in Circles
Illustration showing arcs measured in positive and negative angles.
Intersecting Lines in Circles
Illustration showing various circles and the angles formed by intersecting lines.
Construction of Bisecting a Given Angle
Illustration of the construction used to bisect a given angle.
Construction of an Equal Angle Given a Point and a Straight Line
Illustration of the construction used to create an equal angle given a point in a given straight line…
Construction to Find the Third Angle of a Triangle When Given Two Angles
Illustration of the construction used to find the third angle of a triangle when two of the angles are…
Construction of a Triangle When Given Two Sides and Included Angle
Illustration of the construction used to make a triangle when given two sides and the included angle.
Construction of a Triangle When Given a Side and Two Angles
Illustration of the construction used to make a triangle when given a side and two angles.
Construction of a Triangle When Given Two Sides and the Angle Opposite (Ambiguous Case)
Illustration of the construction used to make a triangle when given two sides and the angle opposite…
Construction of a Triangle When Given Two Sides and the Angle Opposite (Ambiguous Case)
Illustration of the construction used to make a triangle when given two sides and the angle opposite…
Construction of a Triangle When Given Two Sides and the Angle Opposite (Ambiguous Case)
Illustration of the construction used to make a triangle when given two sides and the angle opposite…
Construction of a Parallelogram When Given Two Sides and Included Angle
Illustration of the construction used to make a parallelogram when given two sides and the included…
Construction of Escribed Circles With Ex-centres
Illustration of the construction used to escribe circles with centres (centers) called ex-centres of…
Construction to Describe a Segment of a Circle in Which an Angle Can Be Inscribed
Illustration of the construction used upon a given straight line, to describe a segment of a circle…
Construction of a Triangle Given Perimeter, Angle, Altitude
Illustration used to construct a triangle , given the perimeter, one angle, and the altitude from the…
The Bones of the Thorax
Front view of the bones of the thorax, including the ribs, sternum and vertebrae. Labels: 1, first bone…
Scapula
Venter of scapula. Labels: 1, 1, 1, oblique ridges; 2, 2, fossa for subscapularis muscle; 3, superior…
Angle Bisector of Triangle Dividing Opposite Side Into Proportionate Segments
Illustration to show that an angle bisector of a triangle divides the opposite side into segments which…
Exterior Angle Bisector of Triangle Dividing Opposite Side Into Proportionate Segments
Illustration to show that a bisector of a an exterior angle of a triangle divides the opposite side…
