# Geometry

1. Find the diameter of a circle with a circumference of 50 mm. Round your answer to the nearest tenth.

a) 16.0 mm
b) 26.4 mm
c) 8.4 mm
d) 33.5 mm

2. Find the area of the circle with the given radius or diameter. Round your answer to the nearest tenth.

Diameter = 42.0 mm

a) 137.6mm2
b) 376.7 mm2
c) 1,384.74 mm²
d) 6,027.0 mm2

1. a) 16.0 mm
2. b) 376.7 mm2

1. 👍
2. 👎
3. 👁

1. 👍
2. 👎
2. NEED HELP!!! :( I'm new here so ..... i don't know :( ????!!!

1. 👍
2. 👎
3. Please be patient, Sandy. We are volunteer tutors who answer questions when we have the time.

1 is right. 2 is wrong.

Use this formula for the second problem.

A = pi * r^

1. 👍
2. 👎
👤
Ms. Sue
4. OK, I'm so so sorry. It would never happen again! OK thank you so much when i'm finish I'll will tell you the answer OK? :D

1. 👍
2. 👎
5. Is it a) 137.6mm2 is the answer because that's what I got ?

1. 👍
2. 👎
6. I'm so sorry but i'm in a huge rush ms.sue :( !

1. 👍
2. 👎
7. Nope.

Did you use this formula?

A = pi * r^2

1. 👍
2. 👎
👤
Ms. Sue
8. Oops, I'm sorry i got confused the answer is pi(21)^2 = 1384.74

1. 👍
2. 👎
9. Right.

1. 👍
2. 👎
👤
Ms. Sue

## Similar Questions

1. ### Math ~ Check Answers ~

Find the circumference of the circle (use 3.14 for pi). Show your work. Round to the nearest tenth. the radius is 23 yd My Answer: ???? •Circumference = (2) (3.14) (23) •3.14 x 2 x 23 = 144.44

2. ### math

Select the letter of the best answer choice. Use 3.14 or Start Fraction 22 over 7 End Fraction for pi. What is the circumference of the circle? Round your answer to the nearest foot. circle with line across 28ft A. 88 ft B. 84 ft

3. ### Math

Use 3.14 for π. Round answers to the nearest hundredth if necessary. The figure shows a circle with a point Upper X labeled at the center. Calculate the area of Circle X if the diameter is 13 inches. ____ square inches Calculate

4. ### Math

For any circle, which ratio is equal to the number π? Select all that apply. ***A. Circumference ------------------- Diameter B. Circumference ------------------- Radius ***C. Circumference ------------------- 2 Times Radius D.

1. ### Mathematics

1. Find the circumference of the given circle. Round to the nearest tenth. (Circle with radius of 3.5 cm) -22.0 cm -38.5 cm -11.0 cm -42.8 cm 2. Find the area of the given circle. Round to the nearest tenth. (Circle with a

2. ### Algebra

Find the circumference and the area of a circle with diameter 5yd . Use the value 3.14 for π , and do not round your answers. Be sure to include the correct units in your answers.

3. ### math

Find the circumference of the circle. Round your answer to the nearest hundredth. Use 3.14 or 227 for π. the radius is 3 ft

4. ### Math

Find the circumference of the circle. Use 3.14 for π. Round to the nearest unit. (Show picture of circle with a diameter, with 21cm at one side) A) 24cm B) 66CM C) 125cm D) 69cm Please help me understand, that means don't tell me

1. ### Calculus

The measurement of the circumference of a circle is found to be 70 centimeters, with a possible error of 0.9 centimeter. a) Approximate the percent error in computing the area of the circle. (Round your answer to two decimal

2. ### Math

Find the perimeter of a regular 360-sided polygon that is inscribed in a circle of radius 5 inches. If someone did not remember the formula for the circumference of a circle, how could that person use a calculator’s

3. ### MATH

Find the circumference for the circle ( use 3.14 for pi ). Round to the nearest tenth. the circumference for the circle is 23 yd.

4. ### Math

the ratio of circumference of a circle to its diameter is 22:7. what is the circumference of a curcle of the diameter 15.6m?