QUESTION IMAGE
Question
question
what is the sum of the interior angles of a 15 - gon?
answer
attempt 1 out of 2
score: 1/3 penalty: 1 off
Step1: 多边形内角和公式
多边形内角和公式为\((n - 2)\times180^{\circ}\)(\(n\)为边数,\(n\geqslant 3\)且\(n\)为整数)。
Step2: 代入边数计算
已知该多边形为\(15\) - 边形,即\(n = 15\),将\(n = 15\)代入公式\((n - 2)\times180^{\circ}\),得到\((15 - 2)\times180^{\circ}\)。
先计算括号内的值:\(15 - 2=13\)。
再计算乘法:\(13\times180^{\circ}=2340^{\circ}\)。
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\(2340^{\circ}\)