The four main types of angles in geometry are acute, right, obtuse, and straight angles. Angles measure the amount of turn or rotation between two intersecting lines (called arms) that meet at a shared point (the vertex). They are primarily measured using a protractor in degrees ( ∘raised to the composed with power The 4 Main Types of Angles Acute Angle: Measures greater than 0∘0 raised to the composed with power and less than 90∘90 raised to the composed with power
. It represents a sharp turn, like a partially open pair of scissors or a sliced piece of pizza. Right Angle: Measures exactly 90∘90 raised to the composed with power
. It forms a perfect perpendicular square corner, like the edge of a book or a wall meeting the floor. Obtuse Angle: Measures greater than 90∘90 raised to the composed with power but less than 180∘180 raised to the composed with power
. It is a wide, blunt angle, resembling a fully opened hand fan. Straight Angle: Measures exactly 180∘180 raised to the composed with power
. It forms a perfectly flat, straight line pointing in opposite directions. Other Core Angle Measurements
While the four above are the primary classifications, geometry also relies heavily on these standard extensions: Types of Angles: Acute, Right, Obtuse & Straight Explained
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