Equilateral triangle calculator
If you know the length of one side of an equilateral triangle (a), you can use that information to find the perimeter (p) of the triangle: p = 3a
You can also use the side length to find the area of the triangle using the formula:
Area = (√3/4) * a2
You can also use the side length to find the height (h) or the inradius (r) of the triangle:
h = (a√3)/2
r = a/(2√3)
If you know the area of an equilateral triangle, you can use that information to find the length of one side (a) using this formula:
Area = (√3/4) * a2
You can also use the area to find the height (h) or inradius (r) of the triangle:
h = (2 * √(3 * area))/a
r = √((2 * area)/√3)
If you know the height (h) of an equilateral triangle, you can use that information to find the length of one side (a) using this formula:
a = (2 * h)/√3
Calculate an equilateral triangle by:
An equilateral triangle in word problems in mathematics:
- Triangle
Can an equilateral triangle have a right angle?
- Equilateral Δ
What is the area of an equilateral triangle with a circumference of 63 cm?
- An equilateral triangle
The perimeter of an equilateral triangle is 33cm. How long is each side?
- Height
Calculate the height of the equilateral triangle if its perimeter is 31.
- Triangular numbers
The first four triangular numbers are 1,3,6,10. What is the 10th triangular number? Help: A triangular number or triangle number counts objects arranged in an equilateral triangle.
- Equilateral triangle v2
Calculate the side of an equilateral triangle if its perimeter is 132 cm.
- Equilateral triangle v2
An equilateral triangle has a perimeter 36 dm. What is its area?
- Semicircle
The semicircle with center S and the diameter AB is constructed equilateral triangle SBC. What is the magnitude of the angle ∠SAC?
- Equilateral triangle
The equilateral triangle has a 23 cm long side. Calculate its area.
- Equilateral triangle v3
Calculate an equilateral triangle's perimeter and area with a side of 20 dm.
- Funnel
The funnel has the shape of an equilateral cone. Calculate the surface wetted with water if we poured into the funnel 7.1 liters of water.
- Calculate
Calculate the length of a side of the equilateral triangle with an area of 50cm².
- Equilateral triangle
Find the area of an equilateral triangle with a side of 15 cm.
- The perimeter 12
The perimeter of an equilateral triangle is 41.46 inches. If the length of each side is (q - 5.7), what is the value of q?
more triangle problems »
Look also at our friend's collection of math problems and questions:
- Equilateral triangle
- triangle
- right triangle
- Heron's formula
- The Law of Sines
- The Law of Cosines
- Pythagorean theorem
- triangle inequality
- similarity of triangles
- The right triangle altitude theorem