Question

a smaller rectangle of side 5 cm and 2cm is cut out from a bigger rectangle of side of 14 cm and 7cm to form a new shape what is the perimeter of the new rectangle

Answer 1

Answer:

Perimeter is the distance around a closed figure whereas area is the part of the plane occupied by the closed figure.

The perimeter of the following geometrical shapes are discussed in the first section:

Square

Perimeter of a square = 4 × side

Rectangle

Perimeter of a rectangle = 2 × (length + breadth)

The section is divided into two sub-parts:

1. Triangles as parts of rectangles

2. Generalising for other congruent parts of rectangles

Before moving onto exercise 11.2, the topics Area of triangle and parallelogram are discussed.

Area of a square = side × side

Area of a rectangle = length × breadth

Area of a parallelogram = base × height

Area of a triangle =1/2 × base × height