Isosceles triangle calculator
Enter the matching side length and base length to calculate the apex and base angles.
Apex angle
77.36°
Base angle
51.32°
Base angle
51.32°
For equal sides
a and base b, the apex angle is 2 asin(b / 2a). Each base angle is half of the remaining angle.
3D triangle representation
Height
6.24 units
Perimeter
26.00 units
Area
31.22 square units