Curriculum
Mathematics — First Preparatory
Unit 1: Numbers
0/10
Unit 2: Algebra
0/4
Unit 3: Statistics
0/6
Text lesson
Types of Angles and Their Relations
Types of Angles and Their Relations
Common mistakes
Common mistakes
- Confusing complementary angles (sum 90°) with supplementary angles (sum 180°).
- Treating any two neighbouring angles as vertically opposite. Vertically opposite angles do not share an arm.
- Forgetting that co-interior angles add up to 180° and are not equal.
- Classifying angles wrongly. An angle of 135° is obtuse, not acute.
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