Q1 of 69 Page 250

Each side of an equilateral triangle is 8 cm. Its altitude is

It is given that,

Each side of an equilateral triangle, a = 8 cm


We know that,


Area of equilateral triangle =


=


= × 64


=


= 16 cm2


Also,


Area of triangle =


16 = × a × Altitude



∴ Altitude =


= 4 cm


Hence, altitude of the triangle is 4 cm


Thus, option (c) is correct

More from this chapter

All 69 →
32

A floral design on a floor is made up of 16 triangular tiles, each having sides 9cm, 28 cm and 35 cm. Find the cost of polishing the tiles at the rate of Rs. 2.50 per cm2

[Take =2.454]


 33

A kite in the shape of a square with each diagonal 32 cm and having a tail in the shape of an isosceles triangle of base 8cm and each side 6cm, is made of three different shades as shown in the figure. How much paper of each shade has been used in it?

[Given : = 2.24]


 2

The perimeter of an isosceles right- angled triangle having a as each of the equal sides is

 3

For an isosceles triangle having base = 12 cm and each of the equal sides equal to 10 cm, the height is