angelyn's answer to Lumine's Secondary 2 Maths Singapore question.

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angelyn
Angelyn's answer
23 answers (A Helpful Person)
1st
• sum of angles in a triangle
• angles at a point
• angles on a straight line
• angles in an equilateral triangle
• base angles of an isosceles triangle
• alternate angles (line A // line B)
• corresponding angles (line A // line B)
• interior angles (line A // line B)
• angles at a right angle