Polygon Riddles
1. I am a polygon with exactly 2 lines of symmetry.
2. I have 4 right angles.
3. Two of my sides are longer than the other two sides.
rectangle
An angle that has exactly 180 degrees
straight angle
Make sure to write the equation before solving it!
Length = 12 ft
Width = 6 ft
A = l x w
A = 12 x 6
A = 72 sq. ft
Find the perimeter of a regular pentagon that has all sides equal to 12 ft.
P = s + s + s + s + s
P = 5s
P = 5 x 12 = 60 ft
This is a quadrilateral with only one pair of parallel sides.
trapezoid
2. I have 3 acute angles.
3. I have 2 sides that are congruent.
Jenny combines a 30-degree angle with a 45-degree angle. The new angle is a/an ___________ angle.
acute angle
Write the equation first! Find the area.
Length = 15 ft
Width = 12 ft.
A = l x w
A = 15 x 12
A = 180 sq. ft.
Find the perimeter of a rectangle that has a width of 148 in. and a length of 200 in.
P = 2l + 2w
P = (2 x 148) + (2 x 200)
P = 296 + 400
P = 496 in.
This is the distance around the outside of a circle.
(Hint: It's not perimeter!)
circumference
1. I have only obtuse angles.
2. My many sides are congruent.
3. I have 6 vertices.
hexagon
Angle with greater than 90 degrees but less than 180 degrees
obtuse angle
Write the equation. Find length if...
A = 108 sq. km
w = 9 km
A = l x w
108 = ____ x 9
l = 12 km
Find the perimeter of an equilateral triangle that has one side that equal 16 cm.
P = s + s + s
P = 3s
P = (3 x 16)
P = 48 cm
This is part of a line between two end points.
line segment
1. I have 3 vertices.
2. One of my angles is 90 degrees.
3. I have no sides that are congruent.
right scalene triangle
An angle with zero degrees
zero angle
Start with the formula & equation. Find the Area!
l = 15 m
w = 8 m
A = l x w so A = 15 x 8 = 120 sq. m
Find the perimeter of a rectangle that has a width of 19 m and a length of 42 m.
Remember to use the formula!
P = 2l + 2w, so P = (2 x 19) + (2 x 42)
P = 38 + 84
P = 122 m
This is a parallelogram with congruent sides.
rhombus
2. I am not a parallelogram.
3. I have 2 pairs of adjacent sides that are congruent.
kite
Natalie combines an angle with 100 degrees with another that is 45 degrees. This creates a/an ______ angle.
obtuse angle
Find the area of a square if one side = 12 in.
A = l x w
A = 12 x 12
A = 144 sq. in.
Find the perimeter of a regular octogon with all congruent sides equal to 12 in.
P = 8 x s
P = 8 x 12
P = 96 in.
line of symmetry