Triangle 28, 36, 40
Triangle with sides labeled with numerals 28, 36, 40 and angles A, B, C labeled.
Triangle ABC With Height h
Triangle ABC with sides a,b,c labeled and angles A,B,C labeled and h labeled as height.
Triangle Accuracy Test using T-square
A test to ensure the triangle is accurate by drawing a perpendicular line from a T-square.
Construction of Triangle Given Angles and Base
Illustration used to construct a triangle given the length of the base and the two base angles.
Acute Triangle
Illustration showing an acute triangle (one that has all three angles that are acute).
Triangle With Altitude and Isosceles Triangles Within
Illustration showing a triangle with an altitude CD passing through the middle of EF. Triangles AEC…
Altitudes Drawn from Base Angles of Isosceles Triangles
Illustration to show altitudes drawn from base angles of an isosceles triangle.
Ambiguous Case of Law of Sines Triangle
Illustration showing ambiguous case when the solution is not a triangle using law of sines.
Triangle With Angle of 25 ° 33' 7" and Side of 37' 7"
Right triangle with angle of 25 ° 33' 7" and side of 37' 7"
Triangle With Angle of 29 ° 31' and Side of 24
Right triangle with angle of 29 ° 31' and side of 24.
Area of a Triangle
Illustration of triangle ABC with altitude a and base b to be used to demonstrate that the area is 1/2ba.
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…
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…
Triangle With Bisector Parallel to the Base
Illustration of a triangle showing that when a line parallel to the base of a triangle bisects one side,…
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 Bisectors of Vertical Angles
Illustration to show the bisector of the vertical angle A of a triangle ABC, and the bisectors of the…
Circumcenter of Triangle
Illustration to show perpendicular bisectors in a triangle. It is known as the circumcenter.
Triangle Construction When Given 2 Angles and Included Side
Triangle construction when given two angles and the included side.
Construction Of Triangle
Illustration used to show how to draw a triangle when given two sides and the included angle of the…
Construction of an Equilateral Triangle
Illustration used to construct an equilateral triangle on a given base.
Construction Used to Circumscribe a Circle About a Triangle
Illustration used to circumscribe a circle about a given triangle.
Construction Used to Escribe a Circle to a Triangle
Illustration used to escribe a circle to a given triangle. "A circle which is tangent to one side of…
Construction Used to Inscribe a Circle in a Triangle
Illustration used to inscribe a circle in a given triangle.
Degenerate Conic Forming Triangle
Illustration showing intersecting straight lines meeting to form a triangle. It is formed by the intersection…
Equiangular Triangle
Illustration showing an equiangular triangle (one that has all three angles that are equal).
Exterior And Interior Angles Of A Triangle
An illustration showing a triangle with interior angles A, B, C, and exterior angles D, and A' + B'.
Triangle with Exterior Angles Drawn
Illustration showing a triangle with exterior angles. This can be used to show the sum of the three…
Incenter of Triangle
Illustration to show angle bisectors in a triangle. It is known as the incenter.
Right Triangle Inscribed in Semicircle Shows Mean Proportional
Right triangle inscribed in semicircle. Illustration shows that the perpendicular from any point in…
Isosceles Triangle With Interior Segment Drawn
Illustration showing an isosceles triangle with a segment inside. This can be used to show that in an…
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…
Triangle With Line Parallel to Base and Two Intersecting Lines
Illustration showing a triangle with a line parallel to the base and two intersecting lines.
Medians Drawn Drawn to Legs of Isosceles Triangles
Illustration to show the medians drawn to the legs of an isosceles triangle.
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…
Nonagon Inscribed in a Triangle
Illustration of a regular nonagon inscribed in an equilateral triangle. This could also be described…
Oblique Triangle for Distance Across a River
Illustration of oblique triangle used to find distance across a river.
Oblique Triangle for Distance Across a River
Illustration of oblique triangle used to find distance across a river.
Oblique Triangle for Distance Across Lake
Illustration of oblique triangle used to find distance across a lake.
Oblique Triangle Used For Ambiguous Case
Oblique triangle with perpendicular drawn and angle of measure 35 ° 38" given, and sides of 88'…
Oblique Triangle With Perpendicular Drawn
Oblique triangle with perpendicular drawn to form two right triangles, one with angle measuring 36 °…
Oblique Triangle With Side 18" and Angles 60 ° and 38 ° 42'
Oblique triangle with side 18" and angles 60 ° and 38 ° 42'.
Oblique Triangle With Side 21' and Angles 88 ° 24' 11" and 46 ° 14'
Oblique triangle with side 21' and angles 88 ° 24' 11" and 46 ° 14'.