Unit 7 SCA Review Quiz

Hint: Both are equal here

so x+6 = 2x+3 then solve for x

Hint: Here 5x+30 = 90

Now solve for x

Hint: Here 2(2x+7) = 3x+18

Now solve for x

A triangle has vertices at (1, 8), (-3, 4), and (1, 3).

Place the value that BEST completes the sentence.

The perimeter of the triangle is approximately ________ units.

Hint: Find the distance between all three points of all three sides and add them all

​

• 13

• 14

• 15

• 20

Hint: Plug each value for n and check which answer satisfies the question

The formula to calculate the measure of an exterior angle = 360 ° ÷ number of sides = 360 ° /n

• 100

• 100n

A regular Octagon is shown below.

Angle Q is 3x-57 degrees and angle M is 3x degrees.

Which statement explains why the equation 3x-57 = 3x can be used to solve for x?

Hint: Check which type of Octagon this is

A regular hexagon is defined as a closed 2D shape with six equal sides and six equal angles.

• All polygons have congruent sides.

• ​The sum of the interior angle measures of an octagon is 180 degrees

• The value of 3x equals the sum of the interior angles of a regular octagon.

• The interior angles of a regular octagon (or any regular polygon) are congruent.

Hint: The ratio of circumference to its diameter will be π

and π is 3.14

• The radius is always about 1/2 the circumference.

• The ratio of the diameter to the circumference is always a little less than 2.9.

• The ratio of the circumference to the diameter is always a little more than 3.

• The circumference is always the radius times the diameter.