Solve the equation to find a positive value of c: 32 + 42 = c2 again, looking for a friend

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

Find the distance between (0,5) & (-4,2)

Perry observes the opposite parallel walls of a room in how many lines do the plains containing the walls intersect