<< 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

if three forces F1.f2 .f3 act at a point on a Cartesian plane in the daigram .....so if the question says write down the x and y components ..... I really don't understand
Syamthanda Reply
hey , can you please explain oxidation reaction & redox ?
Boitumelo Reply
hey , can you please explain oxidation reaction and redox ?
Boitumelo
for grade 12 or grade 11?
Sibulele
the value of V1 and V2
Tumelo Reply
advantages of electrons in a circuit
Rethabile Reply
we're do you find electromagnetism past papers
Ntombifuthi
what a normal force
Tholulwazi Reply
it is the force or component of the force that the surface exert on an object incontact with it and which acts perpendicular to the surface
Sihle
what is physics?
Petrus Reply
what is the half reaction of Potassium and chlorine
Anna Reply
how to calculate coefficient of static friction
Lisa Reply
how to calculate static friction
Lisa
How to calculate a current
Tumelo
how to calculate the magnitude of horizontal component of the applied force
Mogano
How to calculate force
Monambi
a structure of a thermocouple used to measure inner temperature
Anna Reply
a fixed gas of a mass is held at standard pressure temperature of 15 degrees Celsius .Calculate the temperature of the gas in Celsius if the pressure is changed to 2×10 to the power 4
Amahle Reply
How is energy being used in bonding?
Raymond Reply
what is acceleration
Syamthanda Reply
a rate of change in velocity of an object whith respect to time
Khuthadzo
how can we find the moment of torque of a circular object
Kidist
Acceleration is a rate of change in velocity.
Justice
t =r×f
Khuthadzo
how to calculate tension by substitution
Precious Reply
hi
Shongi
hi
Leago
use fnet method. how many obects are being calculated ?
Khuthadzo
khuthadzo hii
Hulisani
how to calculate acceleration and tension force
Lungile Reply
you use Fnet equals ma , newtoms second law formula
Masego
please help me with vectors in two dimensions
Mulaudzi Reply
how to calculate normal force
Mulaudzi
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, Algebra and trigonometry. OpenStax CNX. Nov 14, 2016 Download for free at https://legacy.cnx.org/content/col11758/1.6
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

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

Ask