第 1 題
1 分Three interior angles of a quadrilateral are \(85^\circ\), \(110^\circ\), and \(70^\circ\).
What is the size of the fourth interior angle?
Pearson Edexcel IGCSE · Mathematics (Specification A)
Polygons：練習題
5 條多項選擇題即時批改，另有 3 條文字題附完整解題步驟，全部圍繞「Polygons」。
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第 2 題
1 分Each interior angle of a regular polygon is \(140^\circ\).
How many sides does this polygon have?
第 3 題
1 分The interior angles of a pentagon are represented by the expressions \(x^\circ\), \((x + 20)^\circ\), \((x + 40)^\circ\), \((x + 60)^\circ\), and \((x + 80)^\circ\).
Calculate the size of the largest interior angle.
第 4 題
1 分How many sides does a polygon named a decagon have?
第 5 題
1 分Calculate the size of each interior angle of a regular decagon (a 10-sided polygon).
第 6 題
2 分Calculate the size of each exterior angle of a regular octagon.
先自己寫一次答案，再對照解題步驟。
第 7 題
5 分The size of each interior angle of a regular polygon is \(162^{\circ}\).
Work out the number of sides of this polygon.
先自己寫一次答案，再對照解題步驟。
第 8 題
4 分A regular polygon has an interior angle sum of \(1260^{\circ}\).
(a) Calculate the number of sides, \(n\), of this polygon.
(b) Find the size of a single exterior angle of this regular polygon.
先自己寫一次答案，再對照解題步驟。
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