## isosceles triangle | right | obtuse | acute isosceles triangle

**Definition of An isosceles triangle**(समद्विबाहु त्रिकोण):

A Triangle with two equal side is an Isosceles Triangle(if two side of triangle equal in length then two angles of triangle also equal), So now Defintion is like "A Triangle with two equal side and Two equal Angles" is an isosceles triangl.lenght a=b and angle α is equal(see in below picture/image)

__isosceles triangle theorem__**if angles, then sides:**If two angles of a triangle are congruent, then the sides opposite those angles are congruent.

**If sides, then angles:**If two sides of a triangle are congruent, then the angles opposite those sides are congruent.

__Area and Perimeter of isosceles Triangle__
perimeter of isosceles triangle=2a+b

Area of isosceles Triangle=1/2*b*h

here h=height of isosceles Triangle,b=base of isosceles Triangle

__Types Of isosceles Triangles__**acute isosceles triangle:**

**obtuse isosceles triangle:**

Obtuse isosceles triangles have one angle that is greater than 90° degrees.(Obtuse triangles have one obtuse angle).sum of the angles of a triangle is always 180 degrees.An obtuse triangle may be scalene or isosceles.

**right isosceles triangle:**

The right isosceles triangle has one 90 degree angle and two acute (< 90 degree) angles.sum of the angles of a triangle is always 180 degrees.A right triangle may be scalene or isosceles.