Vocab
Forms a 90 degree angle
Right Angle
A polygon with three straight lines and three angles
What is the area formula for a rectangle?
A = l x w
A = b x h
Find the area of a square with a side length of 8 cm
A = 64 cm2
Find the area of a parallelogram
b = 12 m
h = 15 m
A = 180 m2
The distance around the outside of a shape
Perimeter
A 4-sided shape that has two sets of parallel sides and 4 right angles
Rectangle
What is the area formula for a parallelogram?
A = b x h
Area of a rectangle
3.4 in by 5.9 in
A = 20.06 in2
Area of a Triangle
b = 4.5 km
h = 5.6 km
A = 12.6 km2
The number of square units inside of a shape
Area
A type of rectangle that has all congruent sides
Square
What is the area formula for a square?
A = l x w
A = b x h
A = s2
Area of a Triangle
b = 10.5 m
h = 12 m
A = 63 m2
Suzie Q. bought a square canvas for her art project. The total area of the canvas is 25 in2. What is the side length of the square?
s = 5 in
Straight lines that never touch
Parallel Lines
A quadrilateral with 2 pairs of parallel lines
Parallelogram
What is the area formula for a triangle?
A = 1/2 x b x h
A = (b x h)/2
Area of a Parallelogram
b = 8.4 ft
h = 5.6 ft
A = 47.04 ft2
Suzie Q. knitted a rectangular scarf. The length of the scarf is 36 inches. The total area is 216 inches2. What is the width of the scarf?
6 inches
Intersecting lines that form a right angle
Perpendicular Lines
A quadrilateral with exactly 1 pair of parallel lines
Trapezoid
What is the area formula for a trapezoid?
A = 1/2(b1 + b2) x h
Area of a Trapezoid
bases: 15 cm and 20 cm
height: 12 cm
A = 210 cm2
Suzie Q. is creating a mural in the shape of a triangle. The height of the triangle is 8 ft and the total area is 80 ft2. What is the base of the triangle?
20 ft