An equilateral triangle ABD is inscribed in a circle as shown in the figure. AC is a diameter of the circle. If the radius of the circle is 10 cm, what is the area of the shaded portion? Options243.7 cm2221.4 cm2273.1 cm2192.4 cm2

A circle is drawn with one of the sides of an equilateral triangle as the diameter of the circle. What is the ratio of the area of the circle to the area of the triangle?

An equilateral triangle and a circle M are inscribed in a circle K, as shown in the figure below.What is the ratio of the area of K to the area of M?Reminder: The area of a circle with radius r is proportional to r2.a. 4:1b. 8:1c. 10:1d. 12:1e. 14:1f. 16:1g. 20:1Question subject is Geometry.Your answer was: 16:1You answered this question correctly! (+5 points)23.38% of students answered this question correctly.

In the figure shown, O is the centre of the circle and AT is a tangent to the circle.Given that the radius of the circle is 4 cm and the length of the tangent is 9 cm, find the area shaded.Give your answer correct to 3 significant figures.

The circle below has center O, and its radius is 9m. Given that =m∠AOB40°, find the area of the shaded region and the length of the arc ADB.

The triangles in the following figure are all equilateral. Area of the bigger triangle is x. What is the area of the shaded region in terms of x ?