7th Q3 Review

Circumference and Area

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Multiple Choice

If the diameter is 48m, what is the radius?

• 96m

• 24m

• 12m

• 4m

Multiple Choice

If the radius is 34in, what is the diameter?

• 17in

• 68in

• 3.4in

• 22in

Circumference is...

C = d π or diameter times pi

C = 2 π r or radius times 2 times pi

π is 3.14

Multiple Choice

Which measurement of a circle do you need to find the CIRCUMFERENCE?

• Diameter

• Radius

Multiple Choice

What is the circumference of the circle shown?

• 113.04 because you multiply 36 and π

• 56.52 because you multiply 18 and π

Multiple Choice

A circle has a RADIUS of 15 cm. What is the CIRCUMFERENCE of this circle?

• 47.1 cm because you multiply 15 and π

• 94.2 cm because you multiply 30 and π

Multiple Choice

A circle has a DIAMETER of 20m. What is the circumference of this circle?

• 31.4m

• 62.8m

Area

remember to use the radius in finding area. If you are given a DIAMETER, divide it by 2.

To square the radius we multiply it to itself.

Example: 9² = 9x9 = 81

Multiple Choice

What measurement of a circle do you need to find the AREA?

• Diameter

• Radius

Multiple Choice

If a circle has a radius of 5, what is the Area of the circle?

• 15.7

• 78.5

Multiple Choice

What is the area of the circle shown?

• 113.04

• 452.16

Multiple Choice

What is the AREA of a circle with a radius of 7cm?

• 21.98cm

• 153.86cm

• 43.96cm

Multiple Choice

Find the area:

• 40 yd
• 40 yd²
• 80 yd²
• 18 yd²

Multiple Choice

Find the area of the figure:

• 30 ft²
• 60 ft²
• 16 ft²
• 36 ft²

Multiple Choice

Find the area of the parallelogram above

• 14.5 ft²

• 26 ft²

• 52 ft²

• 7.3 ft²

Multiple Choice

The area of the rectangle is 120 ft². The base is 15 ft. What is the height?

• 8 ft
• 8 ft²
• 1800 ft
• 0.075 ft

Multiple Choice

What is the area of the triangle?

• 27.3 mi²
• 54 mi²
• 27 mi²
• 54.6 mi²

Multiple Choice

Find the area of the parallelogram

• 35 in²
• 2 in²
• 12 in²
• 35 in

*subtract inside area from outside area

​Area of the shaded region

*add areas

​Total Area

Two different composite figures

Multiple Choice

The arrow shown is on a sign. What is the area of the arrow?

• 17 in2
• 40 in2
• 52 in2
• 61 in2

Multiple Choice

What is the area of the shaded region?

• 14 m²
• 120 m²
• 106 m²
• 134 m²

Surface Area of Triangular Prisms

• Triangular Prisms: 5 faces

• 3 Rectangles & 2 Triangles

• Triangles have the same area

• At least 2 of the rectangles have the same area

Multiple Choice

Find the total surface area of the figure.

• 208
• 112
• 200
• 160

Surface Area Rectangular Prism

Lateral- faces only

Total- faces and bases

Multiple Choice

Find the surface area of the triangular prism.

• 228 in²
• 204 in²
• 304 in²
• 328 in

Surface Area Rectangular Pyramid

• Lateral- faces only
  
  Total- faces and bases

Multiple Choice

A square pyramid is covered with decorative wrapping paper with no overlap.  The net of the box is shown on the right.  How many square centimeters of wrapping paper are needed to cover the surfaces of the box? 

• 108 cm²
• 324 cm²
• 180 cm²
• 432 cm²

Rectangular PRISMS

• V = Bh

• B is the AREA of the BASE

• Rectangle Area = bh

• B = 2x5

• V= (2x5) x 4

Multiple Choice

What is the volume of this rectangular prism?

• 30 ft³

• 36 ft³

• 12 ft³

Triangular PRISMS

• V = Bh

• B is the AREA of the BASE

• Triangle Area = 1/2bh

• B = (5x3)/2 = 7.5

• V= 7.5x10

Multiple Choice

Find the volume.

• 18 m³

• 20 m³

• 16 m³

• 22 m³

Square Pyramids

Multiple Choice

Find the volume of the figure.

• 126 cm³
• 907.5 cm³
• 605 cm³
• 55 cm³

Triangular Pyramids

Multiple Choice

Find the volume.

• 64
• 128
• 384
• 192