op stands on a line QR such that angle por ratio angle qop is 4:5
show that angle qop - angle por = 1/9 * angle qor
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Given: OP stands on a line QR such that angle POR ratio angle QOP is 4:5
To find: Show that angle QOP - angle POR = 1/9 * angle QOR
Solution:
- Now we have given:
angle POR / angle QOP = 4/5
- Reciprocating it, we get:
angle QOP / angle POR = 5/4
- Now applying componendo and dividendo, we get:
angle QOP + angle POR / angle QOP - angle POR = 5 + 4/5 - 4
angle QOP + angle POR / angle QOP - angle POR = 9/1
angle QOR / angle QOP - angle POR = 9/1
- Reciprocating it, we get:
angle QOP - angle POR / angle QOR = 1/9
angle QOP - angle POR = 1/9 x angle QOR
- Hence proved.
Answer:
So we proved that angle QOP - angle POR = 1/9 x angle QOR
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