W SSS, SAS, ASA, AAS Congruence For each pair of triangles, tell: (a) Are they congruent (b) Give the postulate that makes them congruent. 2) 1) 3)

Quadrilateral ABCD is inscribed in circle 0, as shown below. If mZA-80°, m/B-75°, m2C-(y+30)°, and mZD- (x-10)°, which statement is true? 75° 80° A) x- 85 and y 50 B) x-90 and y-45 C) x- 110 and y-75 D) x-115 and y- 70 (y+30)° (x- 10) O D E None of these

2) Guess My Rule Write a formula relating y and x. And then state three more ordered pairs which work a) х Y b)_ Y c) Y 2 -3 1 1 2 2 -2 2 8 2 8 4 -1 3 11 18 4 14 4 32 8 1 a). b). c) Comment on how you found each of these rules: a) b) c)

Which two triangles are congruent by the SAS Theorem? Complete the congruence statement.