Samuel was given the diagram below and asked to prove that AC=BD. What would be the fifth step of the proof? A. ABC=DAC, using the AAA congruence theorem
B. BAD=CDA, using the SAS congruence theorem
C. ACB=CDA, using the SAS congruence theorem
D. ABD=ACD, using the SSS congruence theorem

Two lines parallel to a third line are parallel to each other. always sometimes or never

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?