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The interior-angle sum of every triangle is 180 degrees. Every triangle is the same.
360 degrees because if you add the angles in any shape the answer is 360
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โˆ™ 7y ago
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Anonymous

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โˆ™ 4y ago

As there are two sides equal in an isosceles triangle,they both have two add up to

90 degree.One is 45 degree while the other one is 45 degree too.So as it has a right angle,it has one angle as 90 degree.45+45=90+90=180.So the sum of an right angled isosceles triangle is 180 degree.

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Q: What is the angle sum of an isosceles triangle?
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