What is 193887474738 x 1 = ?

(will give free brainliest )

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¯¯¯¯¯¯¯¯)?

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

Plz ( true - false) all triangles have interior angles whose measure sum to 90.