Question

ᴘʟᴇᴀsᴇ sᴏʟᴠᴇ
ᴅᴏɴᴛ sᴘᴀᴍ☻︎​

Answer 1

Answer:

perimeter is not 4×side it is of square

Answer 2

GIVEN:

• Side of rhombus is 5 cm.
• Diagonal 1 (BD)=12cm.
• Diagonal 2(AC)=15cm.

TO FIND:

• Area of rhombus.
• Perimeter of rhombus.

SOLUTION:

$\sf \large Area \: of \: rhombus= \frac{1}{2} \times D_1 \times D_2$

$\sf= \cancel{\frac{1}{2} \times 15 \times 12} {cm}^{2}$

$\sf= 90cm {}^{2}$

Perimeter of rhombus=4×side

=4×5cm

=20cm

More formulae to know!!

• Area of rectangle=L×B
• Area of Square=side²
• Area of circle=πr²
• Perimeter of rectangle=2(L+B)
• Perimeter of square=4×side
• Circumference of circle=2πr