The Miscellaneous Triangles ClipArt gallery includes illustrations of isosceles, scalene, equilateral, obtuse, acute, concentric, and similar triangles. There are also images of real-world triangles that can be used in application problems, triangles with bisectors drawn, and triangles that are labeled to derive the area formula. ### Bisected Vertical Angle of an Isosceles Triangle

Illustration to show that the bisector of the vertical angle of an isosceles triangle bisects the base,… ### Area of Triangle

"The triangle ABC is divided into 2 right triangles I and II. ABC is seen to be equal to 1/2 of the… ### Area of Triangle

"The child sees triangle ACB = triangle ADB, and that I + II = CA - DB; and so he sees that the area… ### Area of Triangle

"Fig. 3 shows triangle I = triangle II, III = IV, and so triangle ABC = 1/2 of rectangle ABDE. The fact… ### Equilateral

An equilateral triangle is one having all of its sides equal. ### Centers of Equilateral Triangle

Illustration of an equilateral triangle that shows both the centroid (where the medians of the sides… ### 10 Congruent Rotated Equilateral Triangles

Illustration of 10 congruent equilateral triangles that have the same center. Each triangle has been… ### 2 Concentric Equilateral Triangles

Illustration of 2 concentric equilateral triangles. ### 2 Concentric Equilateral Triangles

Illustration of 2 concentric equilateral triangles. ### 20 Congruent Rotated Equilateral Triangles

Illustration of 20 congruent equilateral triangles that have the same center. Each triangle has been… ### 3 Concentric Equilateral Triangles

Illustration of 3 concentric equilateral triangles that are equally spaced. ### 4 Concentric Equilateral Triangles

Illustration of 4 concentric equilateral triangles that are equally spaced. ### 5 Congruent Rotated Equilateral Triangles

Illustration of 5 congruent equilateral triangles that have the same center. Each triangle has been… ### Ladder Leaning Against a Tree

Illustration of a ladder leaning against a palm tree, that is perpendicular to the ground, to form a… ### Using Triangles To Measure A Lake

Illustration that uses triangles to measure the distance across a lake. ### Using Triangles To Measure A Lake

Illustration that uses triangles to measure the distance across a lake. ### Triangle with Medians

Triangle with medians drawn. ### Pentagon With Triangular Sections For Area

Pentagon with dimensions labeled. Pentagon can be used to calculate area by calculating individual triangles… ### 3-sided Polygon

Polygon consisting of 3 sides ### Triangular Polygon

Triangle, triangular polygon ### Using Triangles To Measure A River

Illustration that uses triangles to measure the distance across a river. ### Using Triangles To Measure A River

Illustration that uses triangles to measure the distance across a river. ### Using Triangles To Measure A River

Illustration that uses triangles to measure the distance across a river. ### Scalene

A scalene triangle is one having no two of its sides equal. ### Square

An illustration of a square and triangles within the square. This is an example of a problem that can… ### Skyscraper Giant Stepladder

Illustration of a giant stepladder, sometimes called a skyscraper stepladder, that is opened next to… ### Triangle

Triangle with sides a, b, c and angles A, B, C labeled. ### Triangle 28, 36, 40

Triangle with sides labeled with numerals 28, 36, 40 and angles A, B, C labeled. ### Triangle With Segments

Triangle with segments drawn. ### Triangle With Height and Median

Triangle with height/altitude h and median m. ### Triangle with Church

An illustration of a triangle comprised of a church and two lines. This illustration can be used to… ### Triangle with Lighthouse

An illustration of a three triangles created with boats and a lighthouse. This is an example illustration… ### Triangle with Tower

An illustration of a triangle comprised of a tower and two lines. This illustration can be used to determine… ### Triangle with Tree

An illustration of a triangle comprised of a tree and two lines. This is an example of a problem that… ### Triangle ABC

Illustration showing a triangle with angles A, B, and C labeled. ### Acute Triangle

Illustration showing an acute triangle (one that has all three angles that are acute). ### Acute Triangle

An illustration of an acute triangle with the height/altitude labeled h. ### 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. ### Angle Bisectors In A Triangle

Illustration showing the three angle bisectors in a triangle. ### Area of Triangle

Parallelogram illustration to show where the area of a triangle formula comes from. ### 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… ### Centroid of Triangle

Illustration to show medians in a triangle. It is known as the centroid. ### 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. ### Triangle With Dimensions

Triangle with dimensions labeled. Triangle can be used to calculate area. ### Triangle With Dimensions

Triangle with dimensions labeled. Triangle can be used to calculate area. ### Equiangular Triangle

Illustration showing an equiangular triangle (one that has all three angles that are equal). ### Equilateral triangle

"Having equal sides." — Williams, 1889 ### Equilateral Triangle

Sketch of equilateral triangle with bisectors, medians, and altitudes. ### Equilateral Triangle

Illustration showing an equilateral triangle (one that has three sides 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…