Unit 4 Test Review Area and Circles Circles

Unit 4 Test Review Area and Circles

Circles & Area Unit 4 Parts of a Circle Area Angles Pie Charts Random 10 10 10 20 20 20 30 30 30 40 40 40 50 50 50

Category 1 – 10 Points How do you find the radius & diameter of a circle? Answer R = diameter/2 D= radius x 2

Category 1 – 20 Points What is pi equal to? Answer: 3. 14

Category 1 – 30 Points If a circle has a diameter 100 cm, what is its radius? Answer: 50 cm

Category 1 – 40 Points Ms. Stewart buys a cake and its radius is 15 cm. What is the diameter and circumference of the cake? Answer: D= 15 x 2 = 30 cm C = 30 cm x 3. 14= 94. 2 cm

Category 1 – 50 Points Ira has 2 cat dishes. One has the diameter of 10. 5 cm, and the other dish has a radius of 5. 25? Are both dishes the same circumference? Answer: C= 3. 14 x 10. 5 cm = 32. 97 cm. Yes, both dishes will have the same circumference because the radius is exactly half the diameter.

Category 2 – 10 Points What is the area of: 30 cm 15 cm Answer: A = L x W A = 30 cm x 15 cm = 450 cm 2

Category 2 – 20 Points What is the area of this shape? 10 in 5 in Answer: A = ½ (B x H) A = ½ (5 in x 10 in) = 50 in / 2 = 25 in 2

Category 2 – 30 Points What is the area of this shape? Radius =5 cm Answer: A = 3. 14 x r 2 A = 3. 14 x 5 cm = 78. 5 cm 2

Category 2 – 40 Points Ms. Stewart wants to purchase a pool. The pool has a diameter of 20 ft. What is the area of her potential pool? Answer: R= 20 ft/2 = 10 ft A= 3. 14 x r 2 A = 3. 14 x 10 ft = 314 ft 2

Category 2 – 50 Points Ms. March wants to tile our classroom floor. In order for us to tile the floor we need to know the area. She knows that the length of our classroom is 50 ft and 25 ft wide. What is the area of our classroom? Answer: A = L x W A = 50 ft x 25 ft = 1250 ft 2

Category 3 – 10 Points How many degrees does a right angle have? Answer: 90 degrees

Category 3 – 20 Points If you turned half a circle, how many degrees would you have turned? Answer: 180 degrees

Category 3 – 30 Points Tony Hawk did two 180 s, how many degrees did he rotate? Answer: 360 degrees

Category 3 – 40 Points Charlie was on his scooter. He completed 1 and ½ rotations. How many degrees did he rotate altogether? Answer: 540 degrees

Category 3 – 50 Points Jerome went snowboarding and got some air. His body rotated 1 and ¼. How many degrees did his body rotate? Answer: 360 + 90 = 450 degrees

Category 4 – 10 Points What does a full pie equal to in a fraction and percent? Answer: 1 whole or 100/100 and 100%.

Category 4 – 20 Points What is ¾ in a decimal & percentage? Answer: 0. 75 and 75%

Category 4 – 30 Points Draw both ½ and ¼ on the board in shape of a pie graph.

Category 4 – 40 Points A total of 5000 students took a survey to vote on school uniforms. 35 % of them voted in favor of them. How many students said yes? Answer: 0. 35 x 5000= 1750 students said yes

Category 4 – 50 Points If 35% said yes to school uniforms out of 100%. Out of 5000 students how many were left who voted against them? Answer: 65% of the students voted no.

Category 5 – 10 Points How do you calculate pi? Answer: Circumference/ Diameter = pi

Category 5 – 20 Points I have a deflated balloon, which made a perfect circle. The radius measured 7. 7 cm. What is the diameter? Answer: D = radius x 2 D = 7. 7 x 2 = 15. 4 cm

Category 5 – 30 Points If a pie was broken into 4 pieces. What would each angle measure in degrees? Answer: 90 degrees, 180 degrees, 270 degrees, 360 degrees

Category 5 – 40 Points What are the five types of angles we talked about in class? Answer: Reflex, Acute, Obtuse, Straight and Right

Category 5 – 50 Points What is the area of both shapes combined? A triangle has a base of 3. 3 cm and height of 2. 6 cm. A square measures 3. 3 cm in length and 5 cm in width. Answer: Triangle: A = ½ (3. 3 cm x 2. 6 cm) = 8. 58/2 =4. 29 cm 2 Square: A = 3. 3 cm x 5 cm =16. 5 cm 2 Both combined: 4. 29 + 16. 5= 20. 79 cm 2