Topmarks Angles Alien Attack, 112 0/5 Acute, Right, Obtuse, and Straight Angles Compatible with tablets/phones 2. You can either estimate the angles or read them from a protractor. 113 0/5 Angles of 90, Alien Attack Use your knowledge of angles in this game where you defend the Earth from aliens. 9-11 year olds Pupils Practice estimating angles with this fun geometry game. Your job is to set the right angle to Alien Attack Use your knowledge of angles in this game where you defend the Earth from aliens. 9-11 year olds Pupils Play Alien Angles Online for Free at YaksGames. ALIEN ATTACK!!! Aliens are attacking! Draw a line from the centre of the laser to the centre of the targets and work out the angles needed to shoot all of the spaceships down. Save Activity ᗰᔕ ᑕᕼᗩᖇᒪTOᑎ Using a protractor to measure the alien's laser beams 'attacking' earth. The invasion leads to a series of non-routine problems for pupils to solve by working in small groups. Angles KS2 Maths Game Mathsframe.