1. The sum of dimensions of a cuboid is 25 cm and the TSA is 400 sq.cm. Find the length of diagonal.
2. CABD is a cyclic quadrilateral. CD and AB extended and meet E.
Angle DBE = 25°, angle CAB = 20°, find angle AEC.
3. The length of two chords AB and CD of a circle with centre O are equal. If angle AOB = 60° and CD = 6cm, then calculate the length of radius of the circle.
4. If tan theta. 6 theta = 1 then find theta.
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