Ricardo is constructing the inscribed circle for △abc . he has already used his compass and straightedge to complete the part of the construction shown in the figure.

which construction could be his next step?

construct the angle bisector of ∠sbq .

construct the line through points a and r.

construct the angle bisector of ∠a .

construct the perpendicular to bc through point r.

Which option identifies how kevin should proceed in the following scenario? four years ago kevin designed an mp3 player for young children. now that technology has changed, he would like to update his design to ensure that it encompasses cutting-edge techniques. by creating a third-angle projection of his ideas by designing an isometric projection of his new ideas by referring to past designs and illustrations of his original model by conferring with engineers who have improved upon similar devices