2D Geometry Review 1

Front

What is the formula for the area of a circle?

Back

Area = πr², where r is the radius.

Front

What is the approximate value of π?

Back

π ≈ 3.14

Front

What is a cross section in geometry?

Back

The intersection of a three-dimensional figure and a plane.

Front

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

Back

Circumference = πd, where d is the diameter.

Front

What are parallel lines?

Back

Two lines that never intersect.

Front

What is the triangle inequality theorem?

Back

The sum of the lengths of any two sides of a triangle must be greater than the length of the third side.

Front

How do you calculate the circumference of a circle if the radius is known?

Back

Circumference = 2πr, where r is the radius.

Front

What is the difference between perpendicular and parallel lines?

Back

Perpendicular lines intersect at a right angle, while parallel lines never intersect.

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height.

Front

What is a diameter of a circle?

Back

A line segment that passes through the center of the circle and has endpoints on the circle.