Showing posts with label Geometry. Show all posts
Showing posts with label Geometry. Show all posts
Thursday, July 11, 2024
Thursday, June 13, 2024
Circles
From a point Q, the length of the tangent to a circle is 40cm and the distance Q from the centre is 41cm.Find the radius of the circle.
Sol: Use phythogoras theorem
( OQ )2 =( OP )2+( PQ)2
( 41)2 = (OP )2 + (40 )2
1681 = (OP )2 + 1600
1681-1600 =( OP )2
81 = (OP )2.
√81 = (OP )2
9 = (OP )2
The radius of the circle is 9cm
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