हिन्दी में पढ़ेंHome › Formulas › Properties of a triangle › Exradius
Exradius (Properties of a triangle)
r₁ = Δ / (s − a)
Where: Δ = area of triangle, a = side opposite A, r₁ = Exradius, s = semi-perimeter / arc length
Solved example
Given: Delta = 7, a = 5, s = 10
Find: r_1 (Exradius)
- Formula: r₁ = Δ/(-a + s)
- Substitute the values: r₁ = 7/(10 - 5)
- Result: r₁ = 1.4
Answer: r_1 = 1.4
Calculator
How to calculate Exradius (Properties of a triangle)
- Write down the formula: r₁ = Δ / (s − a).
- Note the known values (Δ, a, s).
- Substitute them and simplify to find r_1.
- Use the calculator above to solve for any letter.
Frequently asked questions
What is the formula for Exradius (Properties of a triangle)?
The formula is r₁ = Δ / (s − a), where Δ = area of triangle, a = side opposite A, r₁ = Exradius, s = semi-perimeter / arc length.
What is Exradius (Properties of a triangle) when Delta = 7, a = 5, s = 10?
r_1 = 1.4. Substitute the values into r₁ = Δ / (s − a) and simplify.