Worksheet: Equilateral Triangles
In this worksheet, we will practice identifying equilateral triangles by their equal side lengths or equal angle measures to find a missing side length, perimeter, or area.
The perimeter of an equilateral triangle is equal to the perimeter of a rectangle with a length of 5 cm and a width of 4 cm. Find the length of one side of the triangle.
Find the perimeter of .
In the figure, find the values of and .
- A ,
- B ,
- C ,
- D ,
- E ,
In the figure below, is an equilateral triangle, , and . Find .
The area of an equilateral triangle is cm2. Find the side length.
The diagram shows an equilateral triangle. Find the length of its sides.
What is the ratio of the length of a side of an equilateral triangle to its perimeter?
A triangle has three sides equal in length and a perimeter of 24 length units. Find the length of one of its sides.
Calculate the length of one of the sides of an equilateral triangle which has a perimeter of 93 m.
Given that triangle is equilateral, and , determine the lengths of and .
- A 60 cm, 60 cm
- B 240 cm, 240 cm
- C 120 cm, 240 cm
- D 120 cm, 120 cm
If one of the sides of an equilateral triangle measures 50 cm, calculate its perimeter.
If a square with side length 54 cm has the same perimeter as an equilateral triangle, what is the side length of the triangle?
Find the value of given is a triangle where .
What is the measure of each angle in an equilateral triangle?
From a deck of cards that has a length of inches, you take two cards and lean them together to create an equilateral triangle. What is the height of the triangle?
- A inches
- B inches
- C inches
- D inches
- E inches
In , if , then .
In , if , then .
If the measure of the vertex angle of an isosceles triangle is , then the triangle is .
- A a right-angled triangle
- B a scalene triangle
- C an equilateral triangle
is a triangle where . Find the value of .
In a triangle , if , what is ?
Write an equation for the perimeter, cm, of an equilateral triangle with sides of length cm.
Find the area of the equilateral triangle whose circumcircle’s equation is .
- A square units
- B square units
- C square units
- D square units
Write this ratio in its simplest form: The ratio of the side length of an equilateral triangle to its perimeter.