Question

ᴘʟᴇᴀsᴇ sᴏʟᴠᴇ
ᴅᴏɴᴛ sᴘᴀᴍ​

Answer 1

Step-by-step explanation:

Area of rhombus = 1/2 * 12 *15

= 90 cm²

Perimeter of rhombus = 4 *5 = 20cm

Answer 2

$\huge \underline { \underline{ \texttt {1st\:Answer }}}$

GIVEN:

• || sides are 16 cm and 24 cm.
• Non || sides are 6 cm and 6cm.
• Altitude=9cm.

TO FIND:

• Perimeter and area of trapezium.

SOLUTION:

Perimeter=sum of all sides

=16cm+24cm+6cm+6cm

=52cm

$\sf Area= \frac{1}{2} \times (sum \: of \: \parallel \:sides) \times height$

$\sf= \frac{1}{2} \times (16 + 24) \times 9$

$\sf \: = \frac{1}{2} \times 40 \times 9$

=20×9cm²

=180cm²

So final answers are:-

• Area=180cm²
• Perimeter=52cm

$\huge \underline{ \underline{ \texttt{2nd\:Answer}}}$

See attachment

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