What is the measure of an acute angle?
0 to 89 degrees
Name this shape:
Pentagon
Define the words AREA and PERIMETER
Area - the space inside of a 2-D polygon.
Perimeter - the distance around the edge of a polygon
An angle that measures exactly 180 degrees
Straight Angle
Draw an angle that is exactly 90 degrees. Label the angle with its name.
Right angle
Draw two lines that are perpendicular to each other.
Draw a polygon with at least 1 pair of parallel sides. Label the parallel sides.
Possible Shapes: trapezoid, parallelogram, hexagon, pentagon.
Find the perimeter of this trapezoid.
23 + 12 + 12 + 27= 74 in
A triangle with exactly 2 congruent sides.
Isosceles Triangle
What is the formula for perimeter of a rectangle?
Perimeter = (2 x w) + (2 x l)
Using a protractor, draw and angle that is 100 degrees
Have students prove their angle with a protractor.
Draw a polygon with 2 lines of symmetry and at least one right angle.
Possible shapes: square, rectangle, rhombus
A square Geoboard has a side length of 12 cm. What is the perimeter of the Geobard?
48 cm 2
A polygon with 6 sides.
Hexagon
A parallelogram with 4 right angles is called...
A rectangle
Draw three line segments: two that are parallel to each other and one that is intersecting.
Label which lines are parallel and which are intersecting.
How many lines of symmetry does an equilateral triangle have?
3:
The classroom is 18 feet long and 21 feet wide. What is the area of the classroom?
387 feet 2
A polygon with 4 congruent sides and two pairs of parallel sides.
Find the area of a rectangle that is 80 inches by 5 inches.
80 x 5 = 400 in2
Together these angles make a right angle. The bottom angle is 73 degrees. What is the measure of angle x?
17 degrees:
90-73=17
Draw a quadrilateral with no sets of parallel sides and exactly one line of symmetry.
Various answers
The area of the field is 117 square yards. The length of the field is 9 yards. What is the PERIMETER of the field?
44 yards
A quadrilateral with 1 pair of congruent sides and one pair of parallel sides.
Trapezoid
The perimeter of a rectangle is 26 feet. The area of the rectangle is 42 feet2 . What are the dimensions of the rectangle?
6 feet by 7 feet