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
Relations between angles
Relations between angles
| Comparison aspect | Main idea | Keywords |
|---|---|---|
| Complementary angles | two angles whose sum is 90°. Each one is the complement of the other | whose |
| Supplementary angles | two angles whose sum is 180°. Each one is the supplement of the other | whose |
| Adjacent angles |
| commonvertexoverlap |
| Vertically opposite angles | two angles whose arms are extensions of each other. They are equal in measure | whosearmsextensionsequal |
| • |
| Anglesstraightlinearound |
Parallel lines and a transversal
- If a transversal cuts two parallel lines
- then:
- Alternate angles are equal in measure.
- Corresponding angles are equal in measure.
- Co-interior angles (on the same side) are supplementary, which means they add up to 180°.
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