Find the areas of the rectangle whose sides are :
(a) 3 cm and 4 cm
(b)12 cm and 21 cm
(c) 2 km and 3 km
(d) 2 m and 70 cm
Answers
Step-by-step explanation:
We know that the degree is the term with the greatest exponent and,
To find the degree of a monomial with more than one variable for the same term, just add the exponents for each variable to get the degree.
The given algebraic expression xy+yz has two terms. The first one is xy and the second is yz.
xy has degree 2 (x has an exponent of 1, y also has 1, and 1+1=2)
yz has degree 2 (y has an exponent of 1, z also has 1, and 1+1=2)
Since the degree is same in both the terms that is 2, therefore, the degree of xy+yz is 2.
Hence, the degree of the algebraic expression xy+yz is 2.
Answer:
We know that
Area of rectangle = Length × Breadth
(a) l = 3 cm and b = 4 cm
Area = l × b = 3 × 4
= 12 sq.cm
(b) l = 12 m and b = 21 m
Area = l × b = 12 × 21
= 252 sq.m
(c) l = 2 km and b = 3 km
Area = l × b = 2 × 3
= 6 sq.km
(d) l = 2 m and b = 70 cm = 0.70 m
Area = l × b = 2 × 0.70
= 1.40 sq.m