Angles
What is an angle called that is more than 90 degree but less than 180 degrees?
Obtuse
Draw line segment AB. Write the answer on your white board.
Get teacher approval. Line should have endpoints on either side.
What is a quadrilateral with two pairs or parallel lines?
Parallelogram.
Parallell lines
Draw a right triangle.
Make sure it has a right angle.
What is the angle called that is less than 90 degrees?
Acute
Draw line CD.
Line has arrows on either end. Does not matter which way the letters go.
What is a parallelogram with 4 right angles and 2 pairs of equal sides?
A rectangle.
What are lines that intersect to form a right angle?
Perpendicular lines
Draw an acute triangle.
What is it called when an angle is exactly 90 degrees?
Right
Draw line segment GF.
Does not matter which way the letters are.
What is a parallelogram with four right angles and four equal sides?
A square.
Draw a pair of parallel lines.
Look at white boards.
Draw an obtuse triangle.
Make sure the triangle has an obtuse angle.
Less than 90 degrees.
Draw ray EF.
Careful with where letters are.
Draw a trapezoid.
Make sure it has exactly one pair of parallel lines.
Draw a pair of perpendicular lines.
Look at white boards.
Draw an equilateral triangle.
Make sure it has three equal side lengths.
Draw a straight angle and label it.
Exactly at 180 degrees.
Draw ray AB.
Watch where letters are.
Draw a parallelogram.
Make sure that it has two pairs of parallel lines.
Draw lines that are intersecting but not perpendicular.
Draw an isosceles and scalene triangle.
Isosceles triangle has at least two equal side lengths and a scalene triangle has no equal side lengths.