Geometry Problem Solving

Front

What is the formula for the circumference of a circle?

Back

C = 2πr, where C is the circumference and r is the radius.

Front

How do you find the circumference of a circle using a calculator's value of π?

Back

Multiply the diameter of the circle by π (C = πd).

Front

What is the relationship between the radius and diameter of a circle?

Back

The diameter is twice the radius (d = 2r).

Front

What is the Pythagorean theorem?

Back

In a right triangle, a² + b² = c², where c is the hypotenuse.

Front

How do you find the length of a side in a right triangle?

Back

Use the Pythagorean theorem to solve for the missing side.

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height.

Front

How do you find the midpoint of a line segment?

Back

Midpoint M = ((x1 + x2)/2, (y1 + y2)/2).

Front

What is the formula for the distance between two points in a coordinate plane?

Back

Distance = √((x2 - x1)² + (y2 - y1)²).

Front

How do you round a number to the nearest tenth?

Back

Look at the hundredths place; if it's 5 or more, round up.

Front

What is the definition of a circle?

Back

A circle is the set of all points in a plane that are equidistant from a given point called the center.