Achha, see, just draw two straight lines crossing each other like a plus sign. Where they meet, you'll spot all four types. The ones opposite each other are vertically opposite, the ones next to each other are adjacent. Complementary or supplementary depends on if they add to 90 or 180 degrees, yaar.
Teaching my own kid geometry in our verandah, I saw he remembers best when I compare angles to the corners of my apple shed's roof—practical things stick, not just the book diagram.
#appearance#cosmetic-surgery
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