Question

bhai rudra bata de na​

Answer 1

Step-by-step explanation:

1. base = 4.4 cm

height = 6cm

area of triangle = 1/2 × base × height

area of triangle = 1/2 × 4.4 × 6

area of triangle = 4.4 × 3 cm sq.

therefore, area of triangle = 13.2 cm sq. ( option - B )

2. let, the side of square be 'x' .

》 area of square = 81 cm sq.

》 x sq. = 81

》 x = 9 cm. ( option-A )

3.let, the side of the square be 'x '.

perimeter of square = 32 cm.

》 4x = 32 cm.

》 x = 8 cm.

area of square = x sq. = 8 sq. = 64 cm sq.

4. a. addition of two shapes is easier method to find the area.

b. addition and subtraction of shapes.

5.a. A = s sq. - a sq.

= 1 sq. + 3×1

= 1 + 3 = 4 cm sq.

b. A = lb - (1/2 × base × height)

= (13×8 ) - 1/2 × 4 × 5

= 104 - 10

= 94 m sq.

6. a. l= 11cm , b = 6cm

area of rectangle = lb = 11 × 6 = 66 cm sq.

b. base = 16 cm , height = 7 cm.

area of triangle = 1/2 × base × height = 1/2 × 16 × 7 = 8× 7 = 56 cm sq.

therefore, area of triangle = 56 cm sq.