Digits, Grade 7, Volume 1, Homework Helper

### 4-1: TEKS Practice

• 1. What are the radii of the circle shown with O as the center? • A. table with 1 row and 4 columns , row1 column 1 , j c comma bar , column 2 q o comma bar , column 3 and , column 4 q j bar , end table

• B. table with 1 row and 4 columns , row1 column 1 , j o comma bar , column 2 q o comma bar , column 3 and , column 4 c o bar , end table

• C. table with 1 row and 4 columns , row1 column 1 , j o comma bar , column 2 q c comma bar , column 3 and , column 4 c j bar , end table

• D. table with 1 row and 4 columns , row1 column 1 , j q comma bar , column 2 q c comma bar , column 3 and , column 4 c j bar , end table

• 2. Which is the diameter of the circle shown? • A. g o bar

• B. q g bar

• C. j o bar

• D. j g bar

• 3. Find the length of the diameter of the circle. • 4. Think About the Process

• a. How do you find the radius of a circle when given the diameter?

• A. To find the radius, you need to add 2 to the diameter.

• B. To find the radius, you need to divide the diameter by 2.

• C. To find the radius, you need to subtract 2 from the diameter.

• D. To find the radius, you need to multiply the diameter by 2.

• b. Find the radius of a circle with a 8 cm diameter.

• 5. Find the length of the radius of the circle shown. • 6. Think About the Process The radius of a pumpkin is 24 cm. The expression 5x + 38 represents the diameter.

• a. What must you do before you can write an equation to solve for x?

• A. Subtract 2 from the radius to find the diameter.

• B. Divide the radius by 2 to find the diameter.

• C. Multiply the radius by 2 to find the diameter.

• b. Write an equation to solve for x. Choose the correct answer below.

• A. 5x + 38 = 22

• B. 5x + 38 = 12

• C. 5x + 38 = 26

• D. 5x + 38 = 48

• c. Find the value of x.

• 7. • a. Writing Find the diameter of the circle.

• b. Describe the relationships among the center, radius, and diameter of a circle.

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