7th Semester 1 Exam Review

Front

What is the definition of similar triangles?

Back

Triangles that have the same shape but may differ in size; their corresponding angles are equal and their corresponding sides are in proportion.

Front

What is the formula for finding the circumference of a circle?

Back

Front

What is the value of Pi (π)?

Back

Pi (π) is approximately 3.14159, and it represents the ratio of a circle's circumference to its diameter.

Front

How do you solve the equation 14 + 3x = 26 for x?

Back

Subtract 14 from both sides to get 3x = 12, then divide by 3 to find x = 4.

Front

What is the equation to find the total cost y of x pounds of cheddar cheese at $4.25 per pound?

Back

The equation is y = 4.25x.

Front

What is a proportion in mathematics?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you find the missing value in a proportion?

Back

Cross-multiply the known values and solve for the unknown value.

Front

What does it mean for two quantities to be directly proportional?

Back

Two quantities are directly proportional if they increase or decrease at the same rate, meaning their ratio remains constant.

Front

What is the definition of a variable in algebra?

Back

A variable is a symbol, often a letter, that represents an unknown value in mathematical expressions or equations.

Front

What is the formula for calculating the area of a circle?

Back