The equation x+(75.3−x)=75.3 represents the sum of two angles. How many possible combinations of angle measures satisfy these conditions? Please Help!!

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¯¯¯¯¯¯¯¯)?

Does the point (1, sqrt 7) lie on circle shown.

Given: pqrs is a parallelogram prove: pr and qs bisect each other at t