Geoboard or Draw IT
Draw or build on a geoboard:
Two line segments that are parallel to each other.
Parallel line segments will never cross each other.
What is a straight angle?
An angle with a measure of 180 degrees
True or False.
All of these quadrilaterals have two pairs of parallel sides.
Answer is True.
What is the perimeter of a rectangle with a length of 28 and a width of 30?
Show the formula you used.
(28x2) + (30 x 2) = 116
28 + 28 + 30 + 30 = 116
True or False
Perpendicular lines always create 90 degree angles.
True
Draw or build on a geoboard:
Two line segments that are perpendicular to each other.
Perpendicular line segments make right angles where they meet or cross.
180 + 90 = 270 degrees
What is a parallelogram?
A quadrilateral that has 2 sets of parallel lines
What is the area of a square with the side length of 9 inches?
36 in2
True or False
Parallel lines will cross but will not make a 90 degree angle.
False
Parallel lines will never intersect
Draw or build on a geoboard:
A polygon with 3 sides and 1 right angle. Label the right angle.
A 3 sided polygon with 1 right angle is a right triangle.
What is the definition of an acute angle?
An angle that is greater than 0 degrees and less than 90 degrees.
What is an isosceles triangle?
A triangle that have 2 sides that are the same length.
(20 x 12) + (8 x 12)
Is this finding the area or perimeter of a shape? How do you know?
Area because it is equivalent to the equation (22 x 12)
How can you find the area of a rectangle?
A = L x W
Draw or build on a geoboard:
A polygon with 2 acute angles and 2 obtuse angles. Label the angles.
My example is a parallelogram.
What is the definition of an obtuse angle?
An angle with a measure greater than 90 degree and less than 180 degrees.
What is the name of a shape with 5 sides?
Pentagon
What is the area of a triangle that has a length of 15 inches and a width of 10 inches?
Find the area and perimeter of a rectangle with dimensions 21 cm and 92 cm. Label with the correct units.
Area = l x w
21 x 92 = 1,932 sq cm
Perimeter = 2L + 2W
(21 x 2) + (92 x 2) =
42 + 184 = 226 cm
Draw or build on a geoboard:
A right, scalene triangle
A right, scalene triangle has 1 90 degree angle and 3 different side lengths
If 2 angles create a straight angle, and one angle measures 45 degrees, what is the measure of the missing angle?
180 - 45 = 135 degrees
Is a square a rectangle? Why or why not?
A square is a rectangle because it is quadrilateral with, 4 right angles, and 2 sets of parallel sides
What is the area of a triangle that has a length of 5 inches and a width of 3 inches?
(5 x 3) divided by 2 = 7 1/2 in2
What is the total measure of 3 right angles and 2, 30 degree angles?
(90 x 3) + (2 x 30) = 330 degrees