Area and Circumference of a Circle

A pizza has a diameter of 50 centimeters.  Which of the following is closest to the circumference of the pizza?  

• 157 cm
• 53.14 cm
• 150 cm
• 201.28 cm

Tags

CCSS.7.G.B.4

The diameter of a circular path is 30 meters.  Using π=3.14, find the approximate circumference of the path.  

• 33.14 m
• 150.72 m
• 94.2 m
• 63.14 m

Tags

CCSS.7.G.B.4

The radius of a circular rug is 3 feet.  Which of the following is closest to the circumference of the rug?

• 3π ft
• 20.84 ft
• 6π ft
• 51.96 ft

Tags

CCSS.7.G.B.4

The diameter of a hot chocolate mug is 4 inches.  Which of the following describes how to calculate the circumference of the mug?  HINT:  WRITE THE FORMULA FIRST.

• Multiply the diameter by π.
• Divide the diameter by 2 and multiply by π.
• Divide the diameter by 2, square the results, and multiply by π.
• Multiply the diameter by 2π.

Tags

CCSS.7.G.B.4

Students in England created the world's largest yo-yo.  Its diameter is about 10 feet long!  Which of these is closest to the area of the yo-yo.  

• 80.5 in²
• 87.5 in²
• 314 in²
• 78.5 in²

Tags

CCSS.7.G.B.4

Five Italian chefs came together to bake the world's largest pizza.  Its diameter is 131 feet long!  Which of these is closest to the area of the pizza?  

• 13471 ft²
• 411 ft²
• 206 ft²
• 4290 ft²

Tags

CCSS.7.G.B.4

The largest cookie ever baked measured a radius of 51 feet.  Which of these is the closest to the area of the cookie?  

• 2601 ft²
• 8167 ft²
• 2042 ft²
• 162 ft²

Tags

CCSS.7.G.B.4