he is another approach to finding the side lengths of a 15°-75°-90° triangle. let CD= square root of 3

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

Aline passes through 3,7 and 6,9 what equation represents the line

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?