Question

Two angle measures of a triangle are given what is the third angle measure 57 68 _ 90 40 __ 29 71 _

Answer 1

`Sum\ of\ angles\ in\ triangle\ is\ 180^(\circ)\\\\ 57^(\circ),68^(\circ),x\\ 57+68+x=180\\ 125+x=180\\ x=55^(\circ)\\\\ 90^(\circ),40^(\circ),x\\ 90+40+x=180\\ 130+x=180\\ x=50^(\circ)\\\\29^(\circ),71^(\circ),x\\ 29+71+x=180\\ 100+x=180\\x=80^(\circ)`