Does anyone know how to do number 3

Anna is constructing a line segment that is congruent to another segment ab. for the construction, which tool should be used to mesure segment ab

In the diagram, the ratios of two pairs of corresponding sides are equal to prove that almn - axyz by the sas similarity theorem, it also needs to be shown that x 6 z un z zz un = 2x zləzz lezy

Sawsan recorded the favorite sport of students at her school. she surveyed 200 students. how many students chose tennis?