GEOMETRY

ACUTE ANGLE

• An angle less than 90° (90° is called a Right Angle)

OBTUSE ANGLE

• An Obtuse Angle is more than 90° but less than 180°

RIGHT ANGLE

• A right angle is an internal angle which is equal to 90°

STRAIGHT ANGLE

• A straight angle is 180 degrees

VERTICAL ANGLE

• Vertical Angles are the angles opposite each other when two lines cross. They are always equal.

ADJACENT ANGLE

• Two angles are Adjacent when they have a common side and a common vertex (corner point) and don't overlap.

COMPLEMENTARY ANGLE

• Two angles are Complementary when they add up to 90 degrees (a Right Angle right angle).

SUPPLEMENTARY ANGLES

• Two Angles are Supplementary when they add up to 180 degrees.

CORRESPONDING ANGLES

• When two lines are crossed by another line (which is called the Transversal), the angles in matching corners are called corresponding angles.

TRANSVERSAL

• A line that crosses at least two other lines.

ACUTE TRIANGLE

• triangle that has all angles less than 90° (90° is a Right Angle)

RIGHT TRIANGLE

• A triangle that has a right angle (90°

OBTUSE TRIANGLE

• A triangle that has an angle greater than 90°

SCALENE TRIANGLE

• A triangle with all sides of different lengths. No sides are equal and no angles are equal

ISOSCELES TRIANGLE

• A triangle with two equal sides The angles opposite the equal sides are also equal

EQUILATERAL TRIANGLE

• A triangle with all three sides of equal length. All the angles are 60°