7th Grade Semester 2 Review

Equations

100

x + 3 = 14

x = 11

200

21 = -7x

x = -3

300

5x + 8 = 28

x = 4

400

-6x + 14 = -34

x = 8

500

5(x - 9) = 15

x = 12

Angles

100

An angle that is less than 90 degrees

Acute

200

Angles that add up to 180 degrees

Supplementary Angles

300

If two angles are complementary and one is 27 degrees, what is the other?

63 degrees

400

Two angles are both complementary and congruent. What is the measure of each angle?

45 degrees

500

Two angles are vertical angles.  One is 49 degrees.  The other is (7x + 14) degrees.  Find x.

x = 5

Area/Volume/SA

100

Find the area of a rectangle with a length of 5 inches and a width of 16 inches.

80 in²

200

Find the area of a triangle with a base of 14 cm and a height of 9 cm.

63 cm²

300

Find the volume of a triangular prism with a length of 20 ft, a width of 30 ft, and a height of 40 ft.

12,000 ft³

400

Find the volume of a square pyramid with a height of 5 in and a side length of 3 in.

15 in³

500

Find the surface area of a rectangular prism with a length of 8 in, a width of 5 in, and a height of 2 in.

132 in²

Probability/Stats

100

A 6-sided dice is rolled twice.  Find P(two 3's)

1/36   or   2.7%

200

A bag contains 3 red marbles, 5 blue marbles, and 2 green marbles.  If two marbles are drawn at random without replacement, find P(two blue).

2/9   or   22.2%

300

Find the mean of the number set:

16, 23, 14, 22, 25

20

400

Find the median of the number set:

18, 22, 19, 15, 26, 28, 14, 30, 16, 21

20

500

The mean of four numbers is 30.  If three of the numbers are 15, 20, and 45, what is the fourth?

40

Vocabulary

100

The number that occurs most often in a set of numbers

Mode

200

Angles that add up to 90 degrees

Complementary

300

The longest side of a right triangle. (No, you don't have to spell it right.)

Hypotenuse

400

A four-sided shape.  (Not necessarily a square, rectangle, etc - the name for any four-sided shape)

Quadrilateral

500

The number in front of a variable

Coefficient