A rectangle is a parallelogram with 4 right angles. Now, since a rectangle is a parallelogram, its opposite sides must be congruent and it must satisfy all other properties of parallelograms .
1. 4 Right Angles, In a rectangle all angles are 90°
To find a diagonal using the Pythagorean theorem :
For example, a rectangle has a length of 12 cm and width 5 cm. How long the diagonal ?
The area of a rectangle can be found by multiplying the length times the width. The formula is: A= l * w, where A is the area, l is the length, w is the width, and * means multiply. If a rectangle has a base of length 10 cm and a width of 5 cm, its area is 10*5= 50 square cm :
Area = lenghth * width
= 10 * 5
= 50 cm
1. 4 Right Angles, In a rectangle all angles are 90°
2. The diagonals of a rectangle are congruent (congruent means that objects have
the same shape. It does not mean that they are 'equal', exactly).
To find a diagonal using the Pythagorean theorem :
For example, a rectangle has a length of 12 cm and width 5 cm. How long the diagonal ?
The area of a rectangle can be found by multiplying the length times the width. The formula is: A= l * w, where A is the area, l is the length, w is the width, and * means multiply. If a rectangle has a base of length 10 cm and a width of 5 cm, its area is 10*5= 50 square cm :
Area = lenghth * width
= 10 * 5
= 50 cm
If the area of the rectangle is known, to find the length and width can be done as follows:
#Note: one of the elements must be known, for example, the length element .
Area of Rectangle = 120 cm. What is the length ?
Length = Area/Width
= 120/ 12
= 10 cm
Do it the same way if the element width is already known
