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…

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

Triangle with labels A, B, C, D

### 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 37-49-94

37-49-94 Triangle

### 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…