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2D Geometry Unit Quiz Review

2D Geometry Unit Quiz Review. Book: Ch . 9 Lessons 1, 2, and 3 Packet: Ch. 8 Lessons 1, 2, and 3. Quiz. Will be provided with all formulas needed Must write formula first, plug in numbers and show your work to get full credit for each problem Make sure you have a calculator!. 9-1.

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2D Geometry Unit Quiz Review

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  1. 2D Geometry Unit Quiz Review Book: Ch. 9 Lessons 1, 2, and 3 Packet: Ch. 8 Lessons 1, 2, and 3

  2. Quiz • Will be provided with all formulas needed • Must write formula first, plug in numbers and show your work to get full credit for each problem • Make sure you have a calculator!

  3. 9-1 • Area of Parallelograms • A = bh • Base and height must be perpendicular • Write formula first! • Plug in values • Solve • Answer = square units

  4. 9-1 • The base of a building is shaped like a parallelogram. The first floor has an area of 20,000 square feet. If the base of this parallelogram is 250 feet, can its height be 70 feet? Explain.

  5. 9-2 • Area of Triangles • A = • Base and height must be perpendicular • Write formula first! • Plug in values • Solve • Answer = square units

  6. 9-2 • Norma has an A-frame cabin. The back is shown below. How many square feet of paint will she need to cover the front and back of the cabin? • If a can of paint covers 20 square feet, how many cans will she need?

  7. 9-3 • Area of Trapezoids • A = • Bases and height must be perpendicular • Write formula first! • Plug in values • Solve using order of operations • Answer = square units

  8. 9-3 • Find the height of a trapezoid given that it has an area of 650 square feet and the lengths of its bases are 23 feet and 42 feet.

  9. 9-3 • Find the area of the figure.

  10. 8-1 • Circumference = the distance around a circle • Diameter = the distance across a circle through its center • Radius = the distance from the center to any point on the circle • If you have the diameter, divide it by 2 to get the radius • If you have the radius, multiply it by 2 to get the diameter

  11. 8-1 • Circumference Formulas (write down): • C = πd OR C = 2πr • Use first formula if given the diameter in the problem • Use second formula if given the radius in the problem • Label answer! • Regular units (in, cm, m, etc.)

  12. 8-1 • Find the circumference of each circle. Use 3.14 for π. Round to the nearest tenth if necessary. 1.) 2.)

  13. 8-1 • At a local park, Sara can choose between two circular paths to walk. One path has a diameter of 120 yards, and the other has a radius of 45 yards. How much farther can Sara walk on the longer path than the shorter path if she walks around the path once?

  14. 8-2 • Area of a circle = interior region of an enclosed figure measured in square units (the space inside) • Area of circle formula (write in notebook): • A = π • If you have the diameter, divide it by 2 to get the radius, then plug into formula • Label answer! • Square units (in2 , m2 , etc.)

  15. 8-2 • Find the area of each circle. Use 3.14 for π. Round to the nearest tenth if necessary. 1.) 2.)

  16. 8-2 • Tarie is cutting material in the shape of semicircles for her craft project. What is the area of the semicircle? Use 3.14 for π.

  17. 8-3 • Area of Composite Figures—divide figure into shapes you can find the area of • STEPS: *Split figure • Write out what shapes you are finding the area of • Show work for each shape • Add areas together & label answer (square units)

  18. 8-3 • Find the area of each figure. Round to the nearest tenth if necessary.

  19. 8-3 • The picture shows the lobby floor of an office building. The floor needs to be covered with tile. How many square feet of tile are needed? • If each square foot of tile costs $1.59, what is the total cost of this project?

  20. 8-3 • Find the area of each figure. Round to the nearest tenth if necessary. 1.) 2.)

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