Area Of Plane Shapes

A rectangle has a length of 20cm and a width of 10cm. What is the area of the rectangle?

• 100cm²

• 30cm²

• 240cm²

• 50cm²

• 200cm²

A triangle has an area of 12cm² and a base of 4cm. Find the height of the triangle.

• The height is 6cm

• The height is 12cm

• The height is 24cm

• The height is 15cm

• The height is 4cm

A field has an area of 150m² and a length of 15m. What is the width of the field?

• 20m

• 15m

• 90m

• 10m

• 100m

Mary and John quarrelled over the formular for finding the area of a trapezium. Mary said that the formula was

 $\frac{a+b}{2}\times h$  while John said that it was  $\frac{h}{2}-\left(a+b\right)$ Who is right.

• Mary

• John

What is the area of a trapezium when a= 3cm , b=5cm and h=10cm

• 10cm²

• 40cm²

• 34cm²

• 21cm²

• 39cm²

The area of a rhombus is 25cm² and diagonal q is 10cm. What is the length of the second diagonal p.

• p = 5

• p = 10

• p = 15

• p = 2.5

• p = 16

The base of a triangle is 10cm, the height is 7cm. What is the area of the triangle.

• 21cm²

• 35cm²

• 17cm²

• 70cm²

• 3cm²

A parallelogram has a height of 10m and a base of 13m. What is the area of the parallelogram.

• 100

• 23

• 130

• 200

• 33

A rectangle has an area of 50cm². The length is 10cm. What is the width.

• 5cm

• 60cm

• 8cm

• 12cm