©2009 G Dear – Not to be sold/Free to use Stage 4 Years 7 & 8 Angles Angles at a Point. Web Press Ctrl-A ©2009 G Dear – Not to be sold/Free to use

Angles at a point which form a revolution add to 360o. ao bo co ao + bo + co = 360o End of Slide

Angles at a point which form a revolution add to 360o. 140o 70o 70o + 140o + 150o 150o = 360o End of Slide

Angles at a point which form a revolution add to 360o. 120o 120o 120o + 120o + 120o 120o = 360o End of Slide

Angles at a point which form a revolution add to 360o. 120o 90o 120o + 50o + 90o +100o 100o = 360o End of Slide

Angles at a Point (5/6) ao + 85o + 95o +130o = 360o ao + 310o = 360o Example 1: Find the value of the pronumeral. 130o 85o 95o ao ao + 85o + 95o +130o = 360o ao + 310o = 360o -310 -310 ao = 50o Reason: Angles at Point End of Slide

Angles at a Point (6/6) bo + 65o + 95o +80o = 360o bo + 240o = 360o bo Example 2: Find the value of the pronumeral. 80o 65o 95o bo bo + 65o + 95o +80o = 360o bo + 240o = 360o -240 -240 bo = 120o Reason: Angles at Point End of Show