If the measure of arc def is 248°, what is the measure of ∠def?

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)

V=x^4-y^4 pick three expressions that can represent the three dimensions of the prism (each in meters)

Caleb and emily are standing 100 yards from each other. caleb looks up at a 45° angle to see a hot air balloon. emily looks up at a 60° angle to see the same hot air balloon. approximately how far is the hot air balloon off the ground? a)44.2 yd. b)63.4 yd. c)73.2 yd. d)89.7 yd.