Question

write the formula of allshapes

Answer 1

which formulas do you want

Answer 2

Triangle
Area = ½ × b × h
b = base
h = vertical height 

Square
Area = a2
a = length of side

Rectangle
Area = w × h
w = width
h = height 

Parallelogram
Area = b × h
b = base
h = vertical height

Trapezium
Area = ½(a+b) × h
h = vertical height 

Circle 
Area = π × r2
Circumference = 2 × π × r
r = radius

Ellipse
Area =πab