Thomas's room is 11.4 feet long. He wants to put up
a poster that takes up 0.25 of the length of a wall.
How long should his poster be?

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¯¯¯¯¯¯¯¯)?

Can someone me and do the problem plz so i can understand it more better

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