Q5 of 97 Page 790

Find the area of an equilateral triangle having each side of length 10 cm. [Take √3 = 1.732.]

Given:

Side of an equilateral triangle = 10 cm

Area of equilateral triangle =

= 25√3

= 25 × 1.732

= 43.3 cm²

The sides of a triangle are in the ratio 12 : 14 :25 and its perimeter is 25.5 cm. The largest side of the triangle is

The parallel sides of a trapezium are 9.7 cm and 6.3 cm, and the distance between them is 6.5 cm. The area of the trapezium is

Find the area of an isosceles triangle each of whose equal side is 13 cm and whose base is 24 cm.

The longer side of rectangular hall is 24 m and the length of its diagonal is 26 m. Find the area of the hall.