Circles: Areas and Circumference

• a)
• b)
• c)
• d)

Tags

CCSS.HSG.C.B.5

The perimeters of the two circles are in the ratio 2 : 3.  The ratio of their areas is ___

• 4 : 9

• 2 : 3

• 7 : 9

• 4 : 10

Say 'TRUE' or 'FALSE'
If areas of two circles are equal, then their circumferences are also equal

• TRUE

• FALSE

Tags

CCSS.7.G.B.4

Say 'TRUE' or 'FALSE'
The distance traveled by a circular wheel of diameter d cm in one revolution is 2πd cm

• TRUE

• FALSE

Tags

CCSS.7.G.B.4

If the sum of areas of two circles with radii R₁ and R₂ is equal to the area of the circle of radius R then 

• R₁ + R₂ = R

• (R₁)² + (R₂)² = R²

• R₁ + R₂ < R

• (R₁)² + (R₂)²  R²

Tags

CCSS.7.G.B.4

Choose the correct answer:
If the circumference of a circle and the perimeter of a square are equal, then

• Area of circle = Area of square

• Area of circle > Area of square

• Area of circle <Area of square 

• Nothing can be said about the relation of areas 

Tags

CCSS.7.G.B.4

Say 'TRUE' or 'FALSE'
Area of the segment of a circle is less than the area of the corresponding sector

• TRUE

• FALSE

Tags

CCSS.HSG.C.B.5

Complete the statement:
The Numerical value of the area of a circle is _________ than the numerical value of its circumference.

• greater 

• smaller

Tags

CCSS.7.G.B.4

What is the area of this circle?

• 4π

• 8π

• 16π

• π

Tags

CCSS.7.G.B.4

What is/are the formula(s) to find the area of a circle?

• πr²

• 2πr

• √π

Tags

CCSS.7.G.B.4