Kai Xuan's answer to CC's Primary 5 Maths Angles & Geometry Singapore question.
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Date Posted:
6 years ago
Hi pls advise why 6 sides minus 2 sides first and then multiple 180 degree?
Because there are 6 sides in the polygon and every angle that are side by side plus will be 180 degree
Hi can u show me in colour which angles add up to 180 degree? Many thanks
angle that are side by side such as a and b ,so a+b is 180degree , easier it is every 2angle in the triangle plus together is equal to 180 degree
Ok thanks..i understand the 6 sides..but do not understand why must minus 2 sides..
Because the formula for the sum of interior angle is the number of side minuse 2
I see..thank u
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