Question

10. The area of a rhombus whose diagonals are of lengths 10 cm and 8.2 cm is: *​

Answer 1

Answer:

41

Step-by-step explanation:

ans : 0.5 x 10 x 8.2= 41 cm square

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Answer 2

Given

• Length of the first diagonal = 10 cm
• Length of the second diagonal = 8.2 cm

To find

• Area of rhombus

Solution

Formula to be used :-

❖ Area of rhombus = ½ × d₁ × d₂

where,

• D₁ = First Diagonal
• D₂ = Second diagonal

Substituting the values,

⟶ ½ × 10 × 8.4

⟶ 5 × 8.4

⟶ 42 cm²

❖ Therefore, area of rhombus = 42 cm²

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Some formulae :-

• Area of square = side × side
• Perimeter of square = 4 × side
• Area of rectangle = l × b
• Perimeter of reactangle = 2(l + b)
• Total surface area of cube = 6 × side²
• Total surface Area of cuboid = 2(lb + bh + hl)