Question

plz... Explain...this..... formula​

Answer 1

Answer:

this is the formula which named heron's formula

where s is the half of sum of all three sides and a,b and c is the side of triangle

this formula is used to calculate any triangles area either it could be equilateral or any other

Answer 2

Answer:

Here two formula is applied

Heron's forumla for triangles area

and one is area of triangle = 1/2 × base × height .

here we have to find

the area of two triangle by Heron's formula

which is

s = a + b + c / 2 (a,b,c are sides of triangle )

√s(s-a)+(s-b)+(s-c)

or by

area of triangle = 1/2 × base × height

and then we have to find area of rectangle

which is

area of rectangle = lenght × breadth.

then we have to add both area of triangle and area of rectangle

note : this formula is applied when height of trapezium is not know to us.