Area - perimeter

Area of a triangle whose base is 15cm and corresponding altitude is 6cm will be

• 45 sq. cm

• 90 sq. cm

• 45 cm

• 90 cm

Diameter of a circle is

• twice its radius

• half of radius

• equal to radius

• one-third of radius

If the area of the triangle is 36 sq cm and the height is 3cm, the base of the triangle will be

• 12cm

• 39cm

• 108cm

• 24cm

Area of an equilateral triangle is given by

In Heron's formula ,if a,b and c are the sides of a triangle then the semiperimeter, 's' is given by

Area of a circle is given by

The circumfrence of a circle is given by

Area of a parallelogram is

Area of a rhombus is

Which of the following quadrilateral has only one pair of opposite sides parallel?

• square

• rectangle

• kite

• trapezium