Lines
What do we call two lines that are the same distance apart and will never touch?
Parallel lines.
What is the name for a 90 degree angle?
A right angle.
What type of triangle has three equally-sized angles and three equally-sized sides?
An equilateral triangle.
How many sides does a quadrilateral have?
Four sides.
What regular polygon has six sides?
A hexagon.
What do we call lines that intersect to form a right angle?
Perpendicular lines.
What do we call an angle that is less than 90 degrees?
An acute angle?
What type of triangle has two sides the same length and two equally-sized angles?
An isosceles triangle.
What is the sum of the interior angles of any quadrilateral?
360 degrees.
What regular polygon has five sides?
A pentagon.
What do we call a line that starts at one point and goes directly to another point and stops there?
A line segment.
What do we call an angle that is greater than 90 degrees?
An obtuse angle.
What type of triangle has one angle greater than 90 degrees?
An obtuse triangle.
What type of quadrilateral has two pairs of opposite sides that are parallel, and four right angles?
A rectangle.
A right triangle has one angle that is 55 degrees. What is the size of the 3rd angle?
35 degrees.
What is a ray?
A line that has one endpoint and continues from there in only one direction forever.
How many degrees are there in a straight angle?
180 degrees.
A triangle has a 90 degree angle and none of the sides are the same length. What types of triangle is this?
A right scalene triangle.
What two types of quadrilateral have two pairs of opposite sides that are parallel, and all sides are the same length?
A square or a rhombus.
How many sides does a decagon have?
10 sides.
What do we call a closed figure with at least three sides.
A polygon.
What piece of equipment do we use to measure angles?
A protractor.
What is the sum of the interior angles of any triangle?
180 degrees.
What type of quadrilateral has only one pair of opposite sides that are parallel?
A trapezium.
What is the area formula of a triangle?
Area = 1/2 x base length x perpendicular height