isosceles (equilateral) triangle calculator

side a side b
angle a angle b
area:
perimeter:
radius of circumscribed circle:
inscribed circle radius:
height of side a:
height of side b:
a corner bisector:
b angle bisector:
the center dividing line of side a:
center dividing line of side b:

area(k) K2 = b2 * (4 × a2 - b2) / 16
perimeter 2 × a + b
side b angle bisector (tb ) tb2 = 4 × a2 - b2 / 2
angle bisector of side a (tb ) ta2 = b2 × a × (2a + b) / (a + b)2
side a median line (ma ) ma2 = (2 * b2 + a2) / 4
side b median line ( mb ) mb2 = (4 * a2 - b2) / 4
circumscribed circle radius a / ( 2 * sin (A)) or b / ( 2 * sin (B))
radius of inscribed circle (r) r2 = b2 × (2a - b) / (4 × (2a + b))