5. In order to determine the stadia interval factor of a transit on the field, the trans was set up at a certain point on the ground. Observations were made on the rc placed at a distance of 240 m from the instrument and the rod readings were 4.5 C and 2.105 for the upper and lower stadia hairs respectively. If instrument interv used has an interior focusing telescope, what would be the stadia interval factor the instrument?

10. \( \triangle A B C \) is right angled at \( A \). \( A D \) is perpendicular to \( B C \). If \( A B=8 \mathrm{~cm}, B C=10 \mathrm{~cm} \) and \( A C=6 \mathrm{~cm} \). Find the area of \( \triangle A B C \). Also, find the length of \( A D \). 214

An equilateral triangle it's perimeter equals 27 cm , then it's side length is......

14. Find the radius of a hemisphere of volume \( 80 \mathrm{~cm}^{3} \)

3.4.1 What type is triangle \( A B C \) ?

Find the area of a parallelogram \( A B C D \) whose bese \( B C \) is 27 cm and altitude \( A E \) is 8 cm . If the lengh of the altitude \( A F \) to the base \( C D \) is 12 cm . Find \( C D \).