##### Geometry Chapter 8 Review

9th grade, 10th grade

a^{2} + b^{2} = c^{2}

x = 12

y = 10.39

What is sin A?

sin A = ^{12}/_{13 }

What is cos A?

cos A = ^{5}/_{13}

What is tan A?

tan A = ^{12}/_{5}

What is sin B?

sin B = ^{5}/_{13}

What is cos B?

cos B = ^{12}/_{13}

What is tan B?

tan B = ^{5}/_{12}

What is the law of sines?

a = b = c

sin A sin B sin C

Using the law of sines, what is the equation to solve for *
<B*?

sin B = sin 95

16 27

If you are solving for **
a** using the law of cosines, what formula do you use?

a^{2} = b^{2} + c^{2} - 2bc cos A

If you are solving for *
x* using the law of cosines, what formula do
you use?

x^{2} = 7^{2 }+ 11^{2} - 2(7)(11)cos 50

Given the diagram, what is *
b* equal to?

b = sqrt (d*e)

Given the diagram, what is *
a* equal to?

a = sqrt (d*f)

Find AD.

AD = sqrt (3*9)

Fiind AB.

AB = sqrt (3*12)

Find AC.

AC = sqrt (9*12)