Question

math formula of geometry

Answer 1

Rectangle:
Perimeter=2×(l+b)
Area=l×b

Square:
Perimeter = s + s + s + s = 4 × s
Area = s²

Parallelogram:
Perimeter = a + a + b + b = 2 × a + 2 × b
Area = b × h

Rhombus:
Perimeter = b + b + b + b = 4 × b
Area = b × h

Triangle:
Perimeter = a + b + c
Area = (b × h)/2

Trapezoid:
Perimeter = a + b + c + d
Area=(a+b)/2×h

Circle:
Perimeter = 2 × pi × r
Area = pi × r2