Triangle having two sides equal in length and also two angle are equal is mostly refered to Isosceles Triangle.Two Sides having equal measure and one side which is base is having different measureas compare to another sides. BY using Isosceles Triangle we will get 7 Unknown variables if we know the 3 variables value.

Select Which value you are providing (Side Length(a) , Side Length Base(b)) input value and Click on Calculate to get Side Length(c) Perimeter(P), SemiPerimeter(s), Area(K), Altitude of side a (ha), Altitude of side b (hb), Altitude of side c (hc).

A=Angle A

a=Side a

B=Angle B

b=Side b

C=Angle C

c=Side c

K=Area

s=SemiPerimeter

P=Perimeter

*h*a=Altitude of a

*h*b=Altitude of b

*h*c=Altitude of c

A=C

a=c

*h*a=*h*c

Calculation Options

Triangle having two sides equal in length and also two angle are equal is mostly refered to Isosceles Triangle.we can get the value of Side (a) , Side (b) , Side (c) , Area (K) , Perimeter (P) , SemiPerimeter (s) , Altitude of Side Length (ha) , Altitude of Base (hb) , Altitude of Hypotenuse (hc). Get the value of seven Unknown variables by passing the value of two known variables.By Using following formula :

**Side Length :**
a = c

Where

a = Side Length

c = Side Length

**Angle :**
A = C

Where

A = Angle

C = Angle

**Altitude :**
*ha* = *hc*

Where

*ha* = Altitude a

*hc* = Altitude c

**Perimeter :**
P = a + b + c

Where

a = Side Length

c = Side Length

b = Side Length

**Semiperimeter:**
s = (a + b + c) / 2

Where

a = Side Length

c = Side Length

b = Side Length

**Area of Isosceles:**
K = b/4 * √(4a^{2}-b^{2})

Where

a = Side Length

c = Side Length

b = Side Length

**Altitude a of Isosceles Triangle :**
*ha* = (b/2a) *√(4a^{2}-b^{2})

Where

a = Side Length

c = Side Length

b = Side Length

**Altitude b of Isosceles Triangle :**
*hb* = (1/2)*√(4a^{2}-b^{2})

Where

a = Side Length

c = Side Length

b = Side Length

**Altitude c of Isosceles Triangle :**
*hc* = (b/2a)*√(4a^{2}-b^{2})

Where

a = Side Length

c = Side Length

b = Side Length

### How to use Isosceles Triangle Calculator?

Step by step procedure for Isosceles Triangle Calculator is as follows.

**Step 1: **
Input appropriate value.

**Step 2: **Now click on "Calculate" button to get result.

You will get Side (a) , Side (b) , Side (c) , Area (K) , Perimeter (P) , SemiPerimeter (s) , Altitude of Side Length (ha) , Altitude of Base (hb) , Altitude of Hypotenuse (hc) as per your value input.