In the given figure , triangle s ABC and DEF are similar. The are a of triangle ABC is 9 sq. cm and the are a of triangle DEF is 16 sq. cm. If BC = 2.1 cm find the length of EF.
1) 4.9 cm 2) 6.8 cm 3) 2.8 cm 4) 9.4 cm
The length of each side of an equilateral triangle of area 4Ö3 cm², is
1) 8 cm 2) 4 cm 3) Ö3 / 4 cm 4) 3 cm
A point O is at a distance of 10 cm from the centre of a circle of radius 6 cm. How many tangents can be drawn from point O to the circle ?
1) 1 2) 3 3) infinite 4) 2
If every side of a triangle is doubled, then increase in the area of the triangle is
1) 100Ö2 % 2) 200 % 3) 300 % 4) 400 %
. In the given figure , triangle ABC has be enconstructed similar to triangle A’BC’. What is the scale factor?
1) 3 / 2 2) 5 / 4 3) 2 / 3 4) 4 / 3
