4th Grade Geometry Review

Front

What is an angle?

Back

An angle is formed by two rays (sides) that share a common endpoint (vertex).

Front

What is a right angle?

Back

A right angle measures exactly 90 degrees.

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet and are always the same distance apart.

Front

How do you estimate an angle?

Back

To estimate an angle, look at its size compared to known angles (like 0°, 90°, and 180°) and make an educated guess.

Front

What is the measure of a straight angle?

Back

A straight angle measures exactly 180 degrees.

Front

What is a triangle?

Back

A triangle is a polygon with three sides and three angles.

Front

What are the types of triangles based on angles?

Back

Triangles can be classified as acute (all angles < 90°), right (one angle = 90°), or obtuse (one angle > 90°).

Front

What is a quadrilateral?

Back

A quadrilateral is a polygon with four sides and four angles.

Front

What are the properties of a rectangle?

Back

A rectangle has opposite sides that are equal and all angles are right angles.

Front

What is a square?

Back

A square is a special type of rectangle where all four sides are equal in length.