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miller_introductory_algebra_3e_ch1_3

second anglea b Measure of a 180° measure of t hird anglea b measure of first angle b x 2x 7x 10 180 10x 10 180 10x 170 x 17 x 17. 2x 21172 34 7x 10 71172 10 129 Solving a Geometry Application Involving Circumference The distance around a circular garden is 188.4 ft. Find the radius to the nearest tenth of a foot. Use 3.14 for . Solution: C 188.4 ft Use the formula for the circumference of a circle. Substitute 188.4 for C. C 2pr 188.4 2pr 188.4 2p 2pr 2p 2p. Divide both sides by r 188.4 2p r 188.4 213.142 30.0 The radius is approximately 30.0 ft. r p Example 6 168 Chapter 2 Linear Equations and Inequalities Classroom Example: p. 172, Exercise 66 x 2x (7x 10) 180 Step 5: Solve for x. Step 6: Interpret the results and write the answer in words. The smallest measure is The other measures are The measures of the angles are 17°, 34°, and 129°. Answer 7. 2.0 cm Step 3: Write a verbal model. Step 4: Write a mathematical equation. Skill Practice 7. The circumference of a drain pipe is 12.5 cm. Find the radius. Round to the nearest tenth of a centimeter.


miller_introductory_algebra_3e_ch1_3
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