<< Chapter < Page Chapter >> Page >

Section exercises

Verbal

Describe the altitude of a triangle.

The altitude extends from any vertex to the opposite side or to the line containing the opposite side at a 90° angle.

Got questions? Get instant answers now!

Compare right triangles and oblique triangles.

Got questions? Get instant answers now!

When can you use the Law of Sines to find a missing angle?

When the known values are the side opposite the missing angle and another side and its opposite angle.

Got questions? Get instant answers now!

In the Law of Sines, what is the relationship between the angle in the numerator and the side in the denominator?

Got questions? Get instant answers now!

What type of triangle results in an ambiguous case?

A triangle with two given sides and a non-included angle.

Got questions? Get instant answers now!

Algebraic

For the following exercises, assume α is opposite side a , β is opposite side b , and γ is opposite side c . Solve each triangle, if possible. Round each answer to the nearest tenth.

α = 43° , γ = 69° , a = 20

Got questions? Get instant answers now!

α = 35° , γ = 73° , c = 20

  β = 72° , a 12.0 , b 19.9

Got questions? Get instant answers now!

α = 60° , β = 60° , γ = 60°

Got questions? Get instant answers now!

a = 4 , α = 60° , β = 100°

  γ = 20° , b 4.5 , c 1.6

Got questions? Get instant answers now!

b = 10 , β = 95° , γ = 30°

Got questions? Get instant answers now!

For the following exercises, use the Law of Sines to solve for the missing side for each oblique triangle. Round each answer to the nearest hundredth. Assume that angle A is opposite side a , angle B is opposite side b , and angle C is opposite side c .

Find side b when A = 37° , B = 49° , c = 5.

b 3.78

Got questions? Get instant answers now!

Find side a when A = 132° , C = 23° , b = 10.

Got questions? Get instant answers now!

Find side c when B = 37° , C = 21 , b = 23.

c 13.70

Got questions? Get instant answers now!

For the following exercises, assume α is opposite side a , β is opposite side b , and γ is opposite side c . Determine whether there is no triangle, one triangle, or two triangles. Then solve each triangle, if possible. Round each answer to the nearest tenth.

α = 119° , a = 14 , b = 26

Got questions? Get instant answers now!

γ = 113° , b = 10 , c = 32

one triangle, α 50.3° , β 16.7° , a 26.7

Got questions? Get instant answers now!

b = 3.5 , c = 5.3 , γ = 80°

Got questions? Get instant answers now!

a = 12 , c = 17 , α = 35°

two triangles,   γ 54.3° , β 90.7° , b 20.9 or   γ 125.7° , β 19.3° , b 6.9

Got questions? Get instant answers now!

a = 20.5 , b = 35.0 , β = 25°

Got questions? Get instant answers now!

a = 7 , c = 9 , α = 43°

two triangles,   β 75.7° ,   γ 61.3° , b 9.9 or   β 18.3° , γ 118.7° , b 3.2

Got questions? Get instant answers now!

a = 7 , b = 3 , β = 24°

Got questions? Get instant answers now!

b = 13 , c = 5 , γ = 10°

two triangles, α 143.2° , β 26.8° , a 17.3 or α 16.8° , β 153.2° , a 8.3

Got questions? Get instant answers now!

a = 2.3 , c = 1.8 , γ = 28°

Got questions? Get instant answers now!

β = 119° , b = 8.2 , a = 11.3

no triangle possible

Got questions? Get instant answers now!

For the following exercises, use the Law of Sines to solve, if possible, the missing side or angle for each triangle or triangles in the ambiguous case. Round each answer to the nearest tenth.

Find angle A when a = 24 , b = 5 , B = 22°.

Got questions? Get instant answers now!

Find angle A when a = 13 , b = 6 , B = 20°.

A 47.8° or A 132.2°

Got questions? Get instant answers now!

Find angle B when A = 12° , a = 2 , b = 9.

Got questions? Get instant answers now!

For the following exercises, find the area of the triangle with the given measurements. Round each answer to the nearest tenth.

a = 5 , c = 6 , β = 35°

8.6

Got questions? Get instant answers now!

b = 11 , c = 8 , α = 28°

Got questions? Get instant answers now!

a = 32 , b = 24 , γ = 75°

370.9

Got questions? Get instant answers now!

a = 7.2 , b = 4.5 , γ = 43°

Got questions? Get instant answers now!

Graphical

For the following exercises, find the length of side x . Round to the nearest tenth.

For the following exercises, find the measure of angle x , if possible. Round to the nearest tenth.

A triangle. One angle is 22 degrees with side opposite = 5. Another angle is x degrees with opposite side = 13.

x = 76.9° or  x = 103.1°

Got questions? Get instant answers now!

Notice that x is an obtuse angle.

A triangle. One angle is 55 degrees with side opposite = 21. Another angle is x degrees with opposite side = 24.

110.6°

Got questions? Get instant answers now!

For the following exercises, find the area of each triangle. Round each answer to the nearest tenth.

A triangle. One angle is 93 degrees with opposite side = 32.6. Another side is 24.1.

A 39.4 ,   C 47.6 ,   B C 20.7  

Got questions? Get instant answers now!

Extensions

Find the radius of the circle in [link] . Round to the nearest tenth.

A triangle inscribed in a circle. Two of the legs are radii. The central angle formed by the radii is 145 degrees, and the opposite side is 3.
Got questions? Get instant answers now!

Find the diameter of the circle in [link] . Round to the nearest tenth.

A triangle inscribed in a circle. Two of the legs are radii. The central angle formed by the radii is 110 degrees, and the opposite side is 8.3.

10.1

Got questions? Get instant answers now!

Questions & Answers

calculate molarity of NaOH solution when 25.0ml of NaOH titrated with 27.2ml of 0.2m H2SO4
Gasin Reply
what's Thermochemistry
rhoda Reply
the study of the heat energy which is associated with chemical reactions
Kaddija
How was CH4 and o2 was able to produce (Co2)and (H2o
Edafe Reply
explain please
Victory
First twenty elements with their valences
Martine Reply
what is chemistry
asue Reply
what is atom
asue
what is the best way to define periodic table for jamb
Damilola Reply
what is the change of matter from one state to another
Elijah Reply
what is isolation of organic compounds
IKyernum Reply
what is atomic radius
ThankGod Reply
Read Chapter 6, section 5
Dr
Read Chapter 6, section 5
Kareem
Atomic radius is the radius of the atom and is also called the orbital radius
Kareem
atomic radius is the distance between the nucleus of an atom and its valence shell
Amos
Read Chapter 6, section 5
paulino
Bohr's model of the theory atom
Ayom Reply
is there a question?
Dr
when a gas is compressed why it becomes hot?
ATOMIC
It has no oxygen then
Goldyei
read the chapter on thermochemistry...the sections on "PV" work and the First Law of Thermodynamics should help..
Dr
Which element react with water
Mukthar Reply
Mgo
Ibeh
an increase in the pressure of a gas results in the decrease of its
Valentina Reply
definition of the periodic table
Cosmos Reply
What is the lkenes
Da Reply
what were atoms composed of?
Moses Reply
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply
Practice Key Terms 4

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Precalculus. OpenStax CNX. Jan 19, 2016 Download for free at https://legacy.cnx.org/content/col11667/1.6
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Precalculus' conversation and receive update notifications?

Ask