## Chapter 1 Introduction

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1. A triangle is composed of three sides whose values are 3.0 meters, 4.0 meters, and 6.0 meters. Two of the angles of the triangle are, in degrees,
26.4 and 90.0
36.3 and 90.0
90.0 and 117.3
26.4 and 36.3
30.0 and 45.0

2. The volume of a sphere is 8.0 m^3. The radius of the sphere is, in meters
1.24
2.00
2.65
3.00
3.14

3. The side of a cube is increased by 5%. The percentage increase of the surface area of the cube is,
5%
10%
12%
16%
18%

4. The surface area of a sphere is increased by 8%. The percentage increase of the volume of the sphere is,
5%
10%
12%
16%
18%

5. The radius of the earth is 6400 km. If the atmosphere is approximately 10 km high, then the volume of air around the earth is approximately, in m^3
5.1 E+18
3.6 E+16
2.4 E+14
6.2 E+12
7.7 E+10

6. A right triangle has a perimeter of 10.0 meters and an angle of 30 degrees. The hypotenuse is, in meters
3.85
4.23
5.22
6.76
8.00

7. A rectangle has a perimeter of 28.0 cm and a diagonal of 10.0 cm. One side is, in cm
5.5
6.0
7.7
8.2
9.1

8. In a photographic film the grain size or pixel is a square that is 10 microns on a side. Estimate the number of pixels in a 35 mm film that is 35 mm by 20 mm.
7 E+6
6 E+6
4 E+6
2 E+6
1 E+6