Question

Q2. Read the statement and write True and false:-
i) The square of an odd number is always odd.
i) The Pythagoras theorem can be used to find the missing angle in a right angle triangle.
iii) 43 = 64
iv) If the selling price is greater than the cost price, then the goods are being sold with a loss
v) sin 890 = 0
vi) 122 = 169
Q3. Find the Square and Cube of the following numbers:-
Square
Cube
Number
12
39
25​

Answer 1

Step-by-step explanation:

Q2

(i) TRUE

ex - 3^2 = 3×3 = 9

(ii) FALSE

The Pythagoras theorem can be used to find the missing side in a right angle triangle.

(iii) FALSE

43 is not equal to 64

(iv) FALSE

If cost is greater than selling price then it is gross loss. If selling price is more than cost of goods sold than it is gross profit.

(v) TRUE

sin 890 = sin (3×360-90) = sin -90 = -sin 90 = 0

(vi) FALSE

122 is not equal to 169

Q3

${12}^{2} = 144 \: \\ {12}^{3} = 1728$

${39}^{2} = 1521 \\ {39}^{3} = 59319$

${25}^{2} = 625 \\ {25}^{3} = 15625$