Types of angles 1
Less than 90 degrees.
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What is an acute angle?
Equals 360 degrees.
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What is a revolution?
Lines that never intersect and constantly stay the same distance apart. They are marked with a set of arrows.
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What are parallel lines?
All angles equal are equal.
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What is an equilateral triangle?
A quadrilateral with two pairs of parallel sides, and two pairs of equal angles.
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What is a parallelogram?
Equals 90 degrees.
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What is a right angle?
Two or more angles that total 90 degrees.
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What is a complementary angle?
A line that crosses a pair of parallel lines
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What is a transversal line?
The two base angles equal each other.
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What is an isosceles triangle?
A quadrilateral with two pairs of parallel sides and all angles equal 90 degrees.
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What is a rectangle?
Equals 180 degrees.
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What is a straight angle?
Two lines that intersect and opposite angles equal each other.
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What are vertically opposite angles?
Angles on the same side of the transversal but in a similar position on the parallel lines.
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What are corresponding angles?
All angles are different sizes.
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A parallelogram with all sides equal lengths.
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What is a rhombus?
More than 90 degrees and less than 180 degrees.
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What is an obtuse angle?
The sum of the angles equals 360 degrees.
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What is a revolution?
Angles are on different sides of the transversal and on the inside of the parallel lines.
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What are alternate angles?
All four interior angles are less than 180 degrees.
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What is a convex quadrilateral?
A quadrilateral with two adjacent pairs of equal sides.
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What is a kite?
More than 180 degrees and less than 360 degrees.
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What is a reflex angle?
Two lines that meet at a right angle.
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What are perpendicular lines?
Angles on the same side of the transversal and on the inside of the parallel lines.
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What are co-interior angles.
A quadrilateral with one reflex interior angle.
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What is a non-convex quadrilateral?
A quadrilateral with a least one pair of parallel sides.
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What is a trapezium?