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x² + y² = 41 xy=20 then – (x+y)2= x² + y²+2xy =41+2×20=81 x+y =9…. 
=9/20.
If I is the incentre of ΔABC , if ∠ BAC = 800 , then what is the measure of ∠ BIC?
If O is circumcentre of acute angled triangle ABC, if ∠ BAC = 70˚ then ∠ BOC = ?
One chord of a circle is given as 21.5 cm. Then the radius (r) of the circle must be:
If in a ΔABC, D is a point on BC such that BD = 2 cm , BC = 6 cm then what is ratio of area of ΔABD to area of ΔADC ?
If the ratio of side of a ∆ is 3:4:5, and a ┴ from opposite vertex drawn to the biggest sides at D, if the length of biggest side is 10 then find ra...
Consider two concentric circles having radii 17 cm and 15 cm. What is the length (in cm) of the chord, of the bigger circle, which is a tangent to the s...
AB is the diameter of a circle with centre 'O'. PQ is a chord that cuts AB at 'C'. If radius of the circle is 7.5 cm and AC:CB = 3:2, the find the lengt...
If two complementary angles are in the ratio of 7:2, find the greater angle.
If O is circumcentre of acute angled triangle ABC, if ∠ BAC = 35˚ then ∠ BOC = ?
