Class-8, (Area)

If a rectangle has length and breadth 6x and 4x respectively, for what value of x the area of rectangle will be 96cm²?

• 3cm

• 2cm

• 4cm

• 6cm

Find the area of an equilateral triangle of perimeter 30cm.

• $250\sqrt{3}$ cm

• $25\sqrt{3}$ cm

• 25cm

• 30cm

Find the length of a side of an equilateral triangle having area $484\sqrt{3}$ cm².

• 64cm

• 54cm

• 40cm

• 44cm

Which is the formula to find the area of an isosceles triangle?

• $\sqrt{s\left(s-a\right)\left(s-b\right)\left(s-c\right)}$

• $\frac{\sqrt{3}}{4}a²$

• $.$ $\frac{1}{2}b×h$

• 
  $\frac{b}{4}\sqrt{4a²-b²}$
  

Choose the correct formula to find the area of trapezium.

• $A=\frac{1}{2}h\left(p_1+p_2\right)$

• $A=\frac{1}{2}d\left(p_1+p_2\right)$

• $A=\frac{1}{2}d_1×d_2$

• A=b×h

The area of a square is 64 cm². Find the perimeter of the square.

• 8cm

• 32cm

• 36cm

• 16cm

Find the area of a field in the form of a trapezium, whose parallel sides are 10m and 12m and height of that trapezium is 6m.

• 66m²

• 28m²

• 132m²

• 56m²

Find the area of the given figures.

• 108cm²

• 51cm²

• 29cm²

• 102cm²

Find the area of the given figures.

• 50cm²

• 25cm²

• 15cm²

• 5cm²

Find the area of the given figure.

• 30cm²

• 50cm²

• 100cm²

• 200cm²