@kobayashi_niki Normally, the grenade's pull pin is already pulled out, and you just press the firing pin with your finger - once you let go, the fuse ignites immediately
@miradreaamy The answer is 130. The sum of the interior angles of a triangle is 180°, so the angle above is 60. 180 minus 70 minus 60 equals 50. The angle of a straight line is 180°, so x equals 130,Just do it mentally