NEED TO PASS THIS TEST

How can we find the measure of an exterior angle if we know the measurement of an interior angle

Shane can shovel the driveway in 4 hours, but if his sister it would take 2 hours. how long would it take taylor to shovel the driveway alone

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.