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The area of an isosceles triangle

Definition:

The Isosceles triangle is a variety of scalene triangle, which has two congruent sides (equal). The third side is called base.

The area of an isosceles triangle by base and height, is determined by the classical formula for a triangle – half product of base and its height.

The area of an isosceles triangle by base and lateral side, is determined by a modified version of the formula for right triangle – half product of the base and its height, deducted by one of congruent sides as hypotenuse.

The area of an isosceles triangle by base and height

Computing relationship:

where:

b — the base of triangle;

h — the height of triangle.

Calculator: area of an isosceles triangle


For separation of number integers and decimals, use the symbol – point [.]

the base of triangle — b

the height of triangle — h

 


the area of an isosceles triangle =

 

The area of an isosceles triangle by base and lateral side

Computing relationship:

unde:

a — the lateral side of the triangle;

b — the base of triangle;

Calculator: area of an isosceles triangle


For separation of number integers and decimals, use the symbol – point [.]

the lateral side of the triangle a

the base of triangle — b

 


the area of an isosceles triangle =

 

 

context information: contemporary and archaic unit of measurement of area