An isosceles triangle of sides 13cm, 13cm, 10cm is inscri...
An isosceles triangle of sides 13cm, 13cm, 10cm is inscribed in a circle. What is the radius of the circle?
7cm
12cm
8cm
36cm
69cm
Correct answer is A
In ΔDAC,⌢DAC=θ
sinθ=513
\theta = 22.6°
< DOC = 22.6° \times 2 = 45.2°
\sin 45.2 = \frac{5}{r} \implies r = \frac{5}{\sin 45.2}
r = 7.046cm
= 7\frac{1}{24} cm
Similar Questions
Find the mid point of S(-5, 4) and T(-3, -2) ...
If m : n = 2 : 1, evaluate \frac{3m^2 - 2n^2}{m^2 + mn}...
In the diagram, PQRS is a circle center O. PQR is a diameter and ∠PRQ = 40°. Calculate ∠QSR...
In the circle above, with centre O and radius 7 cm. Find the length of the arc AB, when < AO...
The area shaded with horizontal lines is the solution set of the inequalities; ...
Find the minimum value of the function y = x(1+x) ...
Make r subject of the formula given that \frac{x}{r+a}=\frac{a}{r} ...
In the diagram above, WXYZ is a rhombus and ∠WYX = 20°. What is the value of ∠XZY ...