state gov TSPSC Forest Beat Officer (ఫారెస్ట్ బీట్ ఆఫీసర్) Mock Test 2023 Quantitative Aptitude Geometry Circles, Chords and Tangents
A circle is inscribed in an quadrilateral ABCD in which \(\angle D\) = 90°. If AB = 16 cm, AD = 21 cm and BR = 4 cm, then the radius of the circle is :
1
4 cm
2
5 cm
3
9 cm
4
16 cm