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IN THE GIVEN FIGURE, L IS THE MIDPOINT OF AB, AB IS A CHORD. PROVE THAT OL IS THE PERPENDICULAR TO AB
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let the point O be the midpoint of the circle
let the point O be the midpoint of the circleif O is midpoint of the circle then , by the properties of circle . the chord = the radius of the circle
let the point O be the midpoint of the circleif O is midpoint of the circle then , by the properties of circle . the chord = the radius of the circle I hope it helped you
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Given, AL = LB (L is the midpoint of AB)
OA = OB (Radii of same circle)
OL is common side
So, ∆AOL is congruent to ∆OBL
hence, angle ALO = angle BLO (C.P.C.T.)
now, angle ALO + angle BLO = 180° (linear pair)
Since, angle ALO = angle BLO and their sum is 180°, so to satisfy the conditions, angle ALO and angle BLO both will be equal to 90°
Now, if angle ALO = 90° and angle BLO = 90°, then it means OL is perpendicular on AB (since a perpendicular makes an angle of 90° on both sides with a base line)
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