The quadrilateral ASTV is inscribed in the circle shown below. Jako wants to prove the theorem that says that the measure of the quadrilateral'w opposite angles add to 100%. Me knows that the measure of angle Ale halt the measure of arc BTU and that the measure of angle
Tis half the measure of are snu.
Which of the following is an appropriate step to prove that allo 7.1809
Yes No
Assume that the measure of aro BTUIS 140' and that the measure of aro SNU IS 220"
Assume that the measure of arcs BTU and AU add up to 300",
Substitute 2 m. for a STU.
Substitute
me for are nu