Unit 7 Test Review

Angles of Polygons

100

What is the formula to solve for the sum of interior angles? 

S = (n-2) x 180

200

The sum of exterior angles for ANY polygons is....

360 degrees 

300

What is the sum of the interior angles of a 35-gon? 

5940 degrees

400

What is the measure of EACH interior angle of a regular decagon? 

144 degrees 

500

Find the number of sides of a polygon whose sum of interior angles is 6660 degrees. 

39 sides 

Angles of Triangles

100

The sum of interior angles in a triangle...

180 degrees 

200

How many degrees is EACH angle in an EQUILATERAL triangle?

60 degrees

300

If the three angles in a triangle are: 

<1 = 2x

<2 = x + 1

<3 = 20 

Find the value of x. 

x = 53

400

<1 and <2 are remote angles (non-adjacent interior), <3 is an exterior angle. 

If <1 = 11x - 2

   <2 = 9x + 1

   <3 = 19x + 3

Find the value of x. 

x = 4

500

Triangle ABC is an isosceles triangle where <B is congruent to <C. If AB = 4x + 17, BC = 7x - 5, AC = 16x - 67, find the value of AB.

AB = 45

Similar Figures

100

The sides of similar figures are ____________

proportional

200

How do you solve proportions? What method? 

Cross multiply 

300

What are the three methods for proving that triangles are similar? (think about the initials/acronyms) 

AA, SSS, SAS 

Factoring Review/Factoring & Solving

100

Factor:  x² + 12x + 27

(x+9)(x+3)

200

Factor: x² - 1x - 20

(x + 4)(x - 5)

300

Factor: 2x² +3x - 9 

(x + 3)(2x - 3)

400

Factor and solve: 

x² + 2x - 15 =0

x = -5, 3

500

Factor and solve:

 3x² - 8x = -4

x = 2

x = 2/3 (0.666)