Question

perimeter and area of rectangle, triangle, square​

Answer 1

Step-by-step explanation:

perimeter of rectangle 2(l+b)

area of rectangle l×b

perimeter of square 4a

area of square a^2

perimeter of triangle a+b+c

area of triangle 1/2 × base × height

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Answer 2

Perimeter ::

A perimeter is the distance around a two-dimensional shape or a path that encompasses a shape or its length.

Area ::

The space enclosed within the perimeter or the boundary of a shape is known as area.

Perimeter of rectangle :

    ★2(length+breadth)

Perimeter of triangle :

    ★ P = a + b + c

Perimeter of square :

      ★4×side

Area of rectangle :

      ★length×breadth

Area of triangle :

     ★1/2 ×base×height

Area of an Equilateral Triangle:

• (√3)/4 × side²

Area of Triangle with Three Sides (Heron’s Formula):

• A = √s(s-a)(s-b)(s-c)
• Where,s = (a+b+c) / 2

If any two sides and the angle between them are given,

• Area (∆ABC) = ½ bc sin A
• Area (∆ABC) = ½ ab sin C
• Area (∆ABC) = ½ ca sin B

Area of square :

    ★Side²

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