We are asking for the ratio of the areas of the sectors, not the actual areas. The answer is the same regardless of the actual area of the circle, so information about linear measurements such as radius, diameter, and circumference is useless. Statement 2 alone is unhelpful.

年代tatement 1 alone asserts that。is an inscribed angle that intercepts the arc; therefore, the arc - and the central anglethat intercepts it - has twice its measure, or。From angle addition, this can be subtracted fromto yield the measure of central angleof the shaded sector, which is。That makes that sectorof the circle. The white sector isof the circle, and the ratio of the areas can be determined to be, or。

To find the area of a sector of a circle, we need a way to find the area of the circle and a way to find the central angleof the sector.

年代tatement 1 alone gives us the circumference; this can be divided byto yield radius, and that can be substituted forin the formulato find the area:。

However, it provides no clue that might yield。

From Statement 2 alone, we can find。, an inscribed angle, intercepts an arc twice its measure - this arc is, which has measure。, the corresponding minor arc, will have measure。This gives us, but no clue that yields the area.

Now assume both statements are true. The area isand the shaded sector isof the circle, so the area can be calculated to be。

Assume Statement 1 alone. No clues are given about the measure of, so that of, and, subsequently, the area of the shaded sector, cannot be determined.

Assume Statement 2 alone. Since the circumference of the circle is not given, it cannot be determined what part of the circle, or, subsequently,, is, and therefore, the central angle of the sector cannot be determined. Also, no information about the area of the circle can be determined.

Now assume both statements are true. Letbe the radius of the circle andbe the measure of。Then:

and

The statements can be simplified as

and

From these two statements:

; the second statement can be solved for:

。

, so。

年代ince, the circle has area。年代ince we know the central angle of the shaded sector as well as the area of the circle, we can calculate the area of the sector as

。

The area of asector of radiusis

From the first statement alone, you can halve the diameter to get radius 24 inches.

From the second alone, note that the length of thearc is

Given that length, you can find the radius:

Either way, you can get the radius, so you can calculate the area.

The answer is that either statement alone is sufficient to answer the question.

The time alone is insufficient without the length of the hand. The second statement does not give us that information, only the relationship between the lengths of the two hands, which is useless without the length of the minute hand.

The answer is that both statements together are insufficient to answer the question.

The arc with the greater degree measure is the one which is the greater part of its circle.

If both arcs have the same length, then the one that is the greater part of its circle must be the one on the smaller circle; Statement 1 alone tells us both have the same length, but not which circle is smaller.

If, thenhas the greater radius and, sqbsequently, the greater circumference; it is the larger circle. But we know nothing about the measures of the arcs, so Statement 2 alone is insufficient.

If we know both statements, however, we know that, since the arcs have the same length, andis the larger circle - with greater circumference -must be take up the lesser portion of its circle, and have the lesser degree measure of the two.

andare the central angles that interceptand, respectively. The measure of an arc is equal to that of its central angle, so, is we are given Statement 2, that, we know that。The arcs are the same portion of their respective circles. The larger ofanddetermines which arc is longer; this is given in Statement 1, since, if, thenhas the greater radius and circumference.

Both statements together are sufficient to show thatis the longer of the two, but neither alone is suffcient. From Statement 1, the relative sizes of the circles are known, but not the degree measures of the arcs; it is possible for an arc on a larger circle to have length less than, equal to, or greater than the arc on the smaller circle. From Statement 2 alone, the degree measures of the arcs can be proved equal, but not thier lengths.

From Statement 1 alone,, socan be determined to be aarc. But no method is given to find the length of the arc.

From Statement 2 alone, neithernor radiuscan be determined, as the area of a triangle alone cannot be used to determine any angle or side.

From the two statements together,, and the common sidelength of the equilateral triangle can be determined from the formula

This sidelengthis the radius of the circle. Onceis calculated, the circumference can be calculated, and the arc length will beof this.

If either or both Statement 1 and Statement 2 are known, then then only thing aboutthat can be determined is that it is an arc of measure。Without knowing any of the linear measures of the circle, such as the radius or the circumference, it is impossible to determine the length of。

年代tatement 1 only establishes thatis one-third of the circle. Without other information such as the radius, the circumference, or the length of an arc, it is impossible to determine the length of the chord. Statement 2 alone is also insufficient to give the length of the chord, for similar reasons.

The two statements together, however, establish thatis the length of the major arc of acentral angle, and therefore, two-thirds the circumference. The circumference can therefore be calculated to be, and minor arcis one third of this, or。