Angles

• A right angle is an angle that measures exactly 90 degrees.
• An acute angle is any angle less than 90 degrees.
• An obtuse angle is any angle greater than 90 degrees but less than 180 degrees.
• A reflex angle is any angle greater than 180 degrees but less than 360 degrees.
• Supplementary angles add up to 180 degrees.
• Complementary angles add up to 90 degrees.
• Supplementary angles are two angles whose sum equals 180 degrees.
• Complementary angles are two angles whose sum equals 90 degrees.
• The sum of the interior angles of a polygon with n sides is (n-2) * 180 degrees.
• Complementary angles are two angles that, when added together, equal 90 degrees.
• The measure of the complement of an angle can be found by subtracting its degree measurement from 90.
• The measure of an exterior angle of a regular polygon can be found by subtracting the measure of one interior angle from 360 degrees, divided by the number of sides.
• The measure of an exterior angle of a polygon is the same as the sum of its interior opposite angles.
• The measure of an interior complementary angle can be found by adding the measures of the given angles together.
• The measure of an exterior supplementary angle can be found by subtracting the measure of the given angle from 180 degrees.
• If one angle is twice as large as another, then their difference is equal to 180 degrees.
• An exterior angle of a regular polygon is an angle formed by extending one side of the polygon outward, perpendicular to that side.
• A right angle measures exactly 90 degrees.
• To find the measure of an exterior angle of a regular polygon, divide 360 degrees by the number of sides and then subtract the measure of one interior angle.
• To find the measure of an exterior angle of a regular polygon, divide 360 degrees by the number of sides and then subtract the measure of one interior angle.
• If all sides of a regular polygon have length s units, then the perimeter P of the polygon can be found using the formula P = ns, where n is the number of sides.
• To find the measure of an exterior angle of a regular polygon, divide 360 degrees by the number of sides and then subtract the measure of one interior angle.
• To find the measure of an exterior angle of a regular polygon, divide 360 degrees by the number of sides and then subtract the measure of one interior angle.
• A right triangle has one angle measuring exactly 90 degrees.
• A right triangle has one angle measuring exactly 90 degrees.
• An acute angle is an angle less than 90 degrees.
• A right triangle has one angle measuring exactly 90 degrees.
• A right triangle has one angle measuring exactly 90 degrees.
• An acute triangle has all three angles less than 90 degrees.
• An obtuse angle is an angle greater than 90 degrees but less than 180 degrees.
• An obtuse angle is an angle greater than 90 degrees but less than 180 degrees.
• The measure of an exterior angle of a regular polygon can be found using the formula: Exterior angle = (number of sides - 2) * 180 degrees / number of sides
• The measure of an exterior angle of a regular polygon can be found using the formula: Exterior angle = (number of sides - 2) * 180 degrees / number of sides
• In a triangle, the sum of all three angles must equal 180 degrees.
• A supplementary pair of angles has a total measure of 180 degrees.
• In a triangle, the sum of all three angles must equal 180 degrees.
• In a triangle, the sum of all three angles must equal 180 degrees.
• An obtuse triangle has one angle greater than 90 degrees but less than or equal to 180 degrees.
• An obtuse triangle has one angle greater than 90 degrees but less than or equal to 180 degrees.
• A right triangle has two acute angles that are both less than 90 degrees.